66151822872 has 32 divisors (see below), whose sum is σ = 174083745600. Its totient is φ = 20890049184.

The previous prime is 66151822819. The next prime is 66151822897. The reversal of 66151822872 is 27822815166.

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, 72534438 + ... + 72535349.

It is an arithmetic number, because the mean of its divisors is an integer number (5440117050).

Almost surely, 2^66151822872 is an apocalyptic number.

It is an amenable number.

66151822872 is an abundant number, since it is smaller than the sum of its proper divisors (107931922728).

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

66151822872 is a wasteful number, since it uses less digits than its factorization.

66151822872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145069815 (or 145069811 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The spelling of 66151822872 in words is "sixty-six billion, one hundred fifty-one million, eight hundred twenty-two thousand, eight hundred seventy-two".