66653006641264 has 40 divisors (see below), whose sum is σ = 130173619783680. Its totient is φ = 33060874838208.

The previous prime is 66653006641253. The next prime is 66653006641267. The reversal of 66653006641264 is 46214660035666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66653006641267) 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, 32131512 + ... + 34142935.

It is an arithmetic number, because the mean of its divisors is an integer number (3254340494592).

Almost surely, 2^{66653006641264} is an apocalyptic number.

It is an amenable number.

66653006641264 is a deficient number, since it is larger than the sum of its proper divisors (63520613142416).

66653006641264 is a wasteful number, since it uses less digits than its factorization.

66653006641264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66274957 (or 66274951 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 55.

The spelling of 66653006641264 in words is "sixty-six trillion, six hundred fifty-three billion, six million, six hundred forty-one thousand, two hundred sixty-four".