66624284280 has 64 divisors (see below), whose sum is σ = 204521074560. Its totient is φ = 17353300608.

The previous prime is 66624284273. The next prime is 66624284297. The reversal of 66624284280 is 8248242666.

It is a happy number.

It is a hoax number, since the sum of its digits (48) 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 15 ways as a sum of consecutive naturals, for example, 6450682 + ... + 6461001.

It is an arithmetic number, because the mean of its divisors is an integer number (3195641790).

Almost surely, 2^66624284280 is an apocalyptic number.

66624284280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66624284280 is an abundant number, since it is smaller than the sum of its proper divisors (137896790280).

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

66624284280 is a wasteful number, since it uses less digits than its factorization.

66624284280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12911740 (or 12911736 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 66624284280 in words is "sixty-six billion, six hundred twenty-four million, two hundred eighty-four thousand, two hundred eighty".