664614635754 has 64 divisors (see below), whose sum is σ = 1343099197440. Its totient is φ = 219241261440.

The previous prime is 664614635731. The next prime is 664614635801. The reversal of 664614635754 is 457536416466.

It is a happy number.

It is a super-2 number, since 2×664614635754² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664614635694 and 664614635703.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225062742 + ... + 225065694.

It is an arithmetic number, because the mean of its divisors is an integer number (20985924960).

Almost surely, 2^664614635754 is an apocalyptic number.

664614635754 is an abundant number, since it is smaller than the sum of its proper divisors (678484561686).

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

664614635754 is a wasteful number, since it uses less digits than its factorization.

664614635754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its digits is 43545600, while the sum is 57.

The spelling of 664614635754 in words is "six hundred sixty-four billion, six hundred fourteen million, six hundred thirty-five thousand, seven hundred fifty-four".