65664706701554 has 16 divisors (see below), whose sum is σ = 102490718456448. Its totient is φ = 31527494664432.

The previous prime is 65664706701509. The next prime is 65664706701557. The reversal of 65664706701554 is 45510760746656.

It is a super-2 number, since 2×65664706701554² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65664706701557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6590190392 + ... + 6590200355.

It is an arithmetic number, because the mean of its divisors is an integer number (6405669903528).

Almost surely, 2^{65664706701554} is an apocalyptic number.

65664706701554 is a deficient number, since it is larger than the sum of its proper divisors (36826011754894).

65664706701554 is a wasteful number, since it uses less digits than its factorization.

65664706701554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180390849.

The product of its (nonzero) digits is 127008000, while the sum is 62.

The spelling of 65664706701554 in words is "sixty-five trillion, six hundred sixty-four billion, seven hundred six million, seven hundred one thousand, five hundred fifty-four".