66053918 has 16 divisors (see below), whose sum is σ = 119195520. Its totient is φ = 26818776.

The previous prime is 66053887. The next prime is 66053921. The reversal of 66053918 is 81935066.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123896 + ... + 124427.

It is an arithmetic number, because the mean of its divisors is an integer number (7449720).

Almost surely, 2^66053918 is an apocalyptic number.

66053918 is a deficient number, since it is larger than the sum of its proper divisors (53141602).

66053918 is a wasteful number, since it uses less digits than its factorization.

66053918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248351.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 66053918 is about 8127.3561506802. The cubic root of 66053918 is about 404.2340203807.

The spelling of 66053918 in words is "sixty-six million, fifty-three thousand, nine hundred eighteen".