66442692 has 24 divisors (see below), whose sum is σ = 155243200. Its totient is φ = 22117536.

The previous prime is 66442687. The next prime is 66442693. The reversal of 66442692 is 29624466.

It is a self number, because there is not a number n which added to its sum of digits gives 66442692.

It is not an unprimeable number, because it can be changed into a prime (66442693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6609 + ... + 13287.

Almost surely, 2^66442692 is an apocalyptic number.

It is an amenable number.

66442692 is an abundant number, since it is smaller than the sum of its proper divisors (88800508).

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

66442692 is a wasteful number, since it uses less digits than its factorization.

66442692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515 (or 7513 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 66442692 is about 8151.2386788757. The cubic root of 66442692 is about 405.0255371795.

The spelling of 66442692 in words is "sixty-six million, four hundred forty-two thousand, six hundred ninety-two".