66737473752 has 16 divisors (see below), whose sum is σ = 166843684440. Its totient is φ = 22245824576.

The previous prime is 66737473741. The next prime is 66737473753. The reversal of 66737473752 is 25737473766.

It is a happy number.

66737473752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66737473692 and 66737473701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66737473753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390364013 + ... + 1390364060.

Almost surely, 2^66737473752 is an apocalyptic number.

It is an amenable number.

66737473752 is an abundant number, since it is smaller than the sum of its proper divisors (100106210688).

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

66737473752 is a wasteful number, since it uses less digits than its factorization.

66737473752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780728082 (or 2780728078 counting only the distinct ones).

The product of its digits is 31116960, while the sum is 57.

The spelling of 66737473752 in words is "sixty-six billion, seven hundred thirty-seven million, four hundred seventy-three thousand, seven hundred fifty-two".