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1664414377 = 3947421691
BaseRepresentation
bin110001100110100…
…1111001010101001
311021222220000021221
41203031033022221
511402042230002
6433054102041
756150201023
oct14315171251
94258800257
101664414377
1178457817a
123a54aa921
13206a9a0a2
1411b0a1013
159b1c4c37
hex6334f2a9

1664414377 has 4 divisors (see below), whose sum is σ = 1664840016. Its totient is φ = 1663988740.

The previous prime is 1664414347. The next prime is 1664414399. The reversal of 1664414377 is 7734144661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7734144661 = 18142730081.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1664414377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664414317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206899 + ... + 214792.

It is an arithmetic number, because the mean of its divisors is an integer number (416210004).

Almost surely, 21664414377 is an apocalyptic number.

It is an amenable number.

1664414377 is a deficient number, since it is larger than the sum of its proper divisors (425639).

1664414377 is an equidigital number, since it uses as much as digits as its factorization.

1664414377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425638.

The product of its digits is 338688, while the sum is 43.

The square root of 1664414377 is about 40797.2349185579. The cubic root of 1664414377 is about 1185.0967838010.

The spelling of 1664414377 in words is "one billion, six hundred sixty-four million, four hundred fourteen thousand, three hundred seventy-seven".

Divisors: 1 3947 421691 1664414377