66912366 has 16 divisors (see below), whose sum is σ = 133999488. Its totient is φ = 22275000.

The previous prime is 66912347. The next prime is 66912379. The reversal of 66912366 is 66321966.

It is a happy number.

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, 2010 + ... + 11741.

It is an arithmetic number, because the mean of its divisors is an integer number (8374968).

Almost surely, 2^66912366 is an apocalyptic number.

66912366 is an abundant number, since it is smaller than the sum of its proper divisors (67087122).

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

66912366 is a wasteful number, since it uses less digits than its factorization.

66912366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14567.

The product of its digits is 69984, while the sum is 39.

The square root of 66912366 is about 8179.9979217601. The cubic root of 66912366 is about 405.9776533277.

The spelling of 66912366 in words is "sixty-six million, nine hundred twelve thousand, three hundred sixty-six".