66993820632 has 32 divisors (see below), whose sum is σ = 186093946800. Its totient is φ = 22331273472.

The previous prime is 66993820577. The next prime is 66993820679. The reversal of 66993820632 is 23602839966.

66993820632 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 (54).

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, 155078073 + ... + 155078504.

Almost surely, 2^66993820632 is an apocalyptic number.

It is an amenable number.

66993820632 is an abundant number, since it is smaller than the sum of its proper divisors (119100126168).

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

66993820632 is a wasteful number, since it uses less digits than its factorization.

66993820632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310156592 (or 310156582 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 66993820632 in words is "sixty-six billion, nine hundred ninety-three million, eight hundred twenty thousand, six hundred thirty-two".