664571154161703 has 24 divisors (see below), whose sum is σ = 893293304268288. Its totient is φ = 439468365550176.

The previous prime is 664571154161549. The next prime is 664571154161711. The reversal of 664571154161703 is 307161451175466.

It is a happy number.

It is not a de Polignac number, because 664571154161703 - 2²⁸ = 664570885726247 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664571154161753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44858400 + ... + 57805002.

It is an arithmetic number, because the mean of its divisors is an integer number (37220554344512).

Almost surely, 2^{664571154161703} is an apocalyptic number.

664571154161703 is a deficient number, since it is larger than the sum of its proper divisors (228722150106585).

664571154161703 is a wasteful number, since it uses less digits than its factorization.

664571154161703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12947383 (or 12947106 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 664571154161703 in words is "six hundred sixty-four trillion, five hundred seventy-one billion, one hundred fifty-four million, one hundred sixty-one thousand, seven hundred three".