1664134655 has 8 divisors (see below), whose sum is σ = 1997268000. Its totient is φ = 1331103456.

The previous prime is 1664134639. The next prime is 1664134657. The reversal of 1664134655 is 5564314661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1664134655 - 2⁴ = 1664134639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664134657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16646 + ... + 60044.

It is an arithmetic number, because the mean of its divisors is an integer number (249658500).

Almost surely, 2^1664134655 is an apocalyptic number.

1664134655 is a deficient number, since it is larger than the sum of its proper divisors (333133345).

1664134655 is an equidigital number, since it uses as much as digits as its factorization.

1664134655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51073.

The product of its digits is 259200, while the sum is 41.

The square root of 1664134655 is about 40793.8065764890. The cubic root of 1664134655 is about 1185.0303908364.

The spelling of 1664134655 in words is "one billion, six hundred sixty-four million, one hundred thirty-four thousand, six hundred fifty-five".