66299872 has 24 divisors (see below), whose sum is σ = 131401872. Its totient is φ = 32928000.

The previous prime is 66299867. The next prime is 66299897. The reversal of 66299872 is 27899266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029 + ... + 11692.

It is an arithmetic number, because the mean of its divisors is an integer number (5475078).

Almost surely, 2^66299872 is an apocalyptic number.

It is an amenable number.

66299872 is a deficient number, since it is larger than the sum of its proper divisors (65102000).

66299872 is a wasteful number, since it uses less digits than its factorization.

66299872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13882 (or 13874 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 66299872 is about 8142.4733343131. The cubic root of 66299872 is about 404.7351252875.

The spelling of 66299872 in words is "sixty-six million, two hundred ninety-nine thousand, eight hundred seventy-two".