66156263220824 has 32 divisors (see below), whose sum is σ = 141771225856800. Its totient is φ = 28351123303680.

The previous prime is 66156263220743. The next prime is 66156263220847. The reversal of 66156263220824 is 42802236265166.

It is a congruent number.

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, 31492907 + ... + 33527834.

It is an arithmetic number, because the mean of its divisors is an integer number (4430350808025).

Almost surely, 2^{66156263220824} is an apocalyptic number.

It is an amenable number.

66156263220824 is an abundant number, since it is smaller than the sum of its proper divisors (75614962635976).

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

66156263220824 is a wasteful number, since it uses less digits than its factorization.

66156263220824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65038923 (or 65038919 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 53.

The spelling of 66156263220824 in words is "sixty-six trillion, one hundred fifty-six billion, two hundred sixty-three million, two hundred twenty thousand, eight hundred twenty-four".