66156502828 has 24 divisors (see below), whose sum is σ = 124735172240. Its totient is φ = 30520152000.

The previous prime is 66156502823. The next prime is 66156502829. The reversal of 66156502828 is 82820565166.

It is not an unprimeable number, because it can be changed into a prime (66156502823) 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, 165543 + ... + 399646.

Almost surely, 2^66156502828 is an apocalyptic number.

It is an amenable number.

66156502828 is a deficient number, since it is larger than the sum of its proper divisors (58578669412).

66156502828 is a wasteful number, since it uses less digits than its factorization.

66156502828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567457 (or 567455 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 66156502828 in words is "sixty-six billion, one hundred fifty-six million, five hundred two thousand, eight hundred twenty-eight".