66894392 has 16 divisors (see below), whose sum is σ = 125883960. Its totient is φ = 33325344.

The previous prime is 66894391. The next prime is 66894407. The reversal of 66894392 is 29349866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66894391) 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, 12878 + ... + 17309.

Almost surely, 2^66894392 is an apocalyptic number.

It is an amenable number.

66894392 is a deficient number, since it is larger than the sum of its proper divisors (58989568).

66894392 is a wasteful number, since it uses less digits than its factorization.

66894392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30470 (or 30466 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 66894392 is about 8178.8991924342. The cubic root of 66894392 is about 405.9412988327.

The spelling of 66894392 in words is "sixty-six million, eight hundred ninety-four thousand, three hundred ninety-two".