66814892 has 6 divisors (see below), whose sum is σ = 116926068. Its totient is φ = 33407444.

The previous prime is 66814877. The next prime is 66814897. The reversal of 66814892 is 29841866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66814897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8351858 + ... + 8351865.

It is an arithmetic number, because the mean of its divisors is an integer number (19487678).

Almost surely, 2^66814892 is an apocalyptic number.

It is an amenable number.

66814892 is a deficient number, since it is larger than the sum of its proper divisors (50111176).

66814892 is a wasteful number, since it uses less digits than its factorization.

66814892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16703727 (or 16703725 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 66814892 is about 8174.0376803634. The cubic root of 66814892 is about 405.7804227348.

The spelling of 66814892 in words is "sixty-six million, eight hundred fourteen thousand, eight hundred ninety-two".