66636674 has 32 divisors (see below), whose sum is σ = 110073600. Its totient is φ = 30071232.

The previous prime is 66636649. The next prime is 66636677. The reversal of 66636674 is 47663666.

It is not an unprimeable number, because it can be changed into a prime (66636677) 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, 398939 + ... + 399105.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^66636674 is an apocalyptic number.

66636674 is a deficient number, since it is larger than the sum of its proper divisors (43436926).

66636674 is a wasteful number, since it uses less digits than its factorization.

66636674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its digits is 653184, while the sum is 44.

The square root of 66636674 is about 8163.1289344221. The cubic root of 66636674 is about 405.4193167648.

The spelling of 66636674 in words is "sixty-six million, six hundred thirty-six thousand, six hundred seventy-four".