66604662 has 48 divisors (see below), whose sum is σ = 149883552. Its totient is φ = 21358080.

The previous prime is 66604649. The next prime is 66604679. The reversal of 66604662 is 26640666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64087 + ... + 65117.

It is an arithmetic number, because the mean of its divisors is an integer number (3122574).

Almost surely, 2^66604662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66604662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74941776).

66604662 is an abundant number, since it is smaller than the sum of its proper divisors (83278890).

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

66604662 is a wasteful number, since it uses less digits than its factorization.

66604662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 66604662 is about 8161.1679311236. The cubic root of 66604662 is about 405.3543857431.

The spelling of 66604662 in words is "sixty-six million, six hundred four thousand, six hundred sixty-two".