66253418 has 32 divisors (see below), whose sum is σ = 130429440. Its totient is φ = 24453360.

The previous prime is 66253393. The next prime is 66253423. The reversal of 66253418 is 81435266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8396 + ... + 14247.

It is an arithmetic number, because the mean of its divisors is an integer number (4075920).

Almost surely, 2^66253418 is an apocalyptic number.

66253418 is a deficient number, since it is larger than the sum of its proper divisors (64176022).

66253418 is a wasteful number, since it uses less digits than its factorization.

66253418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22682.

The product of its digits is 34560, while the sum is 35.

The square root of 66253418 is about 8139.6202614127. The cubic root of 66253418 is about 404.6405752889.

The spelling of 66253418 in words is "sixty-six million, two hundred fifty-three thousand, four hundred eighteen".