66604066 has 8 divisors (see below), whose sum is σ = 99954000. Its totient is φ = 33286068.

The previous prime is 66604061. The next prime is 66604073. The reversal of 66604066 is 66040666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66604066² = 8872203215464712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66604061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816 + ... + 11683.

It is an arithmetic number, because the mean of its divisors is an integer number (12494250).

Almost surely, 2^66604066 is an apocalyptic number.

66604066 is a deficient number, since it is larger than the sum of its proper divisors (33349934).

66604066 is a wasteful number, since it uses less digits than its factorization.

66604066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15968.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 66604066 is about 8161.1314166603. The cubic root of 66604066 is about 405.3531766589.

The spelling of 66604066 in words is "sixty-six million, six hundred four thousand, sixty-six".