1664751074568 has 32 divisors (see below), whose sum is σ = 4162282252800. Its totient is φ = 554863082688.

The previous prime is 1664751074537. The next prime is 1664751074621. The reversal of 1664751074568 is 8654701574661.

It is a super-2 number, since 2×1664751074568² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3118963 + ... + 3613506.

It is an arithmetic number, because the mean of its divisors is an integer number (130071320400).

Almost surely, 2^{1664751074568} is an apocalyptic number.

It is an amenable number.

1664751074568 is an abundant number, since it is smaller than the sum of its proper divisors (2497531178232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664751074568 is a wasteful number, since it uses less digits than its factorization.

1664751074568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6742781 (or 6742777 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 1664751074568 in words is "one trillion, six hundred sixty-four billion, seven hundred fifty-one million, seventy-four thousand, five hundred sixty-eight".