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1664150377 is a prime number
BaseRepresentation
bin110001100110000…
…1110101101101001
311021222101121011011
41203030032231221
511402010303002
6433044303521
756145021241
oct14314165551
94258347134
101664150377
1178440789a
123a53a1ba1
13206a06b86
1411b032b21
159b1718d7
hex6330eb69

1664150377 has 2 divisors, whose sum is σ = 1664150378. Its totient is φ = 1664150376.

The previous prime is 1664150363. The next prime is 1664150407. The reversal of 1664150377 is 7730514661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1411054096 + 253096281 = 37564^2 + 15909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664150377 - 211 = 1664148329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1664150347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832075188 + 832075189.

It is an arithmetic number, because the mean of its divisors is an integer number (832075189).

Almost surely, 21664150377 is an apocalyptic number.

It is an amenable number.

1664150377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664150377 is an equidigital number, since it uses as much as digits as its factorization.

1664150377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1664150377 is about 40793.9992768544. Note that the first 3 decimals coincide. The cubic root of 1664150377 is about 1185.0341227037.

The spelling of 1664150377 in words is "one billion, six hundred sixty-four million, one hundred fifty thousand, three hundred seventy-seven".