66385422 has 24 divisors (see below), whose sum is σ = 144306864. Its totient is φ = 22055904.

The previous prime is 66385399. The next prime is 66385433. The reversal of 66385422 is 22458366.

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, 258 + ... + 11525.

It is an arithmetic number, because the mean of its divisors is an integer number (6012786).

Almost surely, 2^66385422 is an apocalyptic number.

66385422 is an abundant number, since it is smaller than the sum of its proper divisors (77921442).

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

66385422 is a wasteful number, since it uses less digits than its factorization.

66385422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12104 (or 12101 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 66385422 is about 8147.7249585390. The cubic root of 66385422 is about 404.9091337070.

The spelling of 66385422 in words is "sixty-six million, three hundred eighty-five thousand, four hundred twenty-two".