66518074 has 32 divisors (see below), whose sum is σ = 117127296. Its totient is φ = 27743040.

The previous prime is 66518057. The next prime is 66518077. The reversal of 66518074 is 47081566.

It is not an unprimeable number, because it can be changed into a prime (66518077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116209 + ... + 116779.

It is an arithmetic number, because the mean of its divisors is an integer number (3660228).

Almost surely, 2^66518074 is an apocalyptic number.

66518074 is a deficient number, since it is larger than the sum of its proper divisors (50609222).

66518074 is a wasteful number, since it uses less digits than its factorization.

66518074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 66518074 is about 8155.8613279040. The cubic root of 66518074 is about 405.1786520666.

The spelling of 66518074 in words is "sixty-six million, five hundred eighteen thousand, seventy-four".