66686150752 has 72 divisors (see below), whose sum is σ = 149646881160. Its totient is φ = 29158272000.

The previous prime is 66686150693. The next prime is 66686150759. The reversal of 66686150752 is 25705168666.

66686150752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 66686150752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66686150759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221749 + ... + 427252.

It is an arithmetic number, because the mean of its divisors is an integer number (2078428905).

Almost surely, 2^66686150752 is an apocalyptic number.

It is an amenable number.

66686150752 is an abundant number, since it is smaller than the sum of its proper divisors (82960730408).

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

66686150752 is a wasteful number, since it uses less digits than its factorization.

66686150752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649056 (or 649035 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 66686150752 in words is "sixty-six billion, six hundred eighty-six million, one hundred fifty thousand, seven hundred fifty-two".