66669600 has 72 divisors (see below), whose sum is σ = 217017360. Its totient is φ = 17777920.

The previous prime is 66669599. The next prime is 66669611. The reversal of 66669600 is 696666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11490 + ... + 16289.

It is an arithmetic number, because the mean of its divisors is an integer number (3014130).

Almost surely, 2^66669600 is an apocalyptic number.

66669600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66669600 is an abundant number, since it is smaller than the sum of its proper divisors (150347760).

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

66669600 is a wasteful number, since it uses less digits than its factorization.

66669600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27802 (or 27789 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 66669600 is about 8165.1454365492. The cubic root of 66669600 is about 405.4860799930.

The spelling of 66669600 in words is "sixty-six million, six hundred sixty-nine thousand, six hundred".