66040222392 has 48 divisors (see below), whose sum is σ = 185026491000. Its totient is φ = 21254323776.

The previous prime is 66040222373. The next prime is 66040222427. The reversal of 66040222392 is 29322204066.

66040222392 is a `hidden beast` number, since 6 + 6 + 0 + 40 + 222 + 392 = 666.

66040222392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66040222392² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15812142 + ... + 15816317.

Almost surely, 2^66040222392 is an apocalyptic number.

It is an amenable number.

66040222392 is an abundant number, since it is smaller than the sum of its proper divisors (118986268608).

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

66040222392 is a wasteful number, since it uses less digits than its factorization.

66040222392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31628500 (or 31628493 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 66040222392 in words is "sixty-six billion, forty million, two hundred twenty-two thousand, three hundred ninety-two".