66604146 has 32 divisors (see below), whose sum is σ = 155115648. Its totient is φ = 18670080.

The previous prime is 66604127. The next prime is 66604163. The reversal of 66604146 is 64140666.

It is a super-2 number, since 2×66604146² = 8872224528778632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12735 + ... + 17186.

It is an arithmetic number, because the mean of its divisors is an integer number (4847364).

Almost surely, 2^66604146 is an apocalyptic number.

66604146 is an abundant number, since it is smaller than the sum of its proper divisors (88511502).

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

66604146 is a wasteful number, since it uses less digits than its factorization.

66604146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29986.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66604146 is about 8161.1363179400. The cubic root of 66604146 is about 405.3533389525.

The spelling of 66604146 in words is "sixty-six million, six hundred four thousand, one hundred forty-six".