66659196 has 24 divisors (see below), whose sum is σ = 155723904. Its totient is φ = 22193200.

The previous prime is 66659179. The next prime is 66659233. The reversal of 66659196 is 69195666.

It is a super-2 number, since 2×66659196² = 8886896822732832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8971 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (6488496).

Almost surely, 2^66659196 is an apocalyptic number.

It is an amenable number.

66659196 is an abundant number, since it is smaller than the sum of its proper divisors (89064708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66659196 is a wasteful number, since it uses less digits than its factorization.

66659196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6641 (or 6639 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The square root of 66659196 is about 8164.5083134259. The cubic root of 66659196 is about 405.4649864379.

The spelling of 66659196 in words is "sixty-six million, six hundred fifty-nine thousand, one hundred ninety-six".