66662508 has 96 divisors (see below), whose sum is σ = 182988288. Its totient is φ = 18662400.

The previous prime is 66662489. The next prime is 66662509. The reversal of 66662508 is 80526666.

It is not an unprimeable number, because it can be changed into a prime (66662509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136641 + ... + 137127.

It is an arithmetic number, because the mean of its divisors is an integer number (1906128).

Almost surely, 2^66662508 is an apocalyptic number.

66662508 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66662508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91494144).

66662508 is an abundant number, since it is smaller than the sum of its proper divisors (116325780).

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

66662508 is a wasteful number, since it uses less digits than its factorization.

66662508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 66662508 is about 8164.7111400220. The cubic root of 66662508 is about 405.4717015793.

The spelling of 66662508 in words is "sixty-six million, six hundred sixty-two thousand, five hundred eight".