66331056 has 40 divisors (see below), whose sum is σ = 186934464. Its totient is φ = 20100160.

The previous prime is 66331051. The next prime is 66331061. The reversal of 66331056 is 65013366.

It is an interprime number because it is at equal distance from previous prime (66331051) and next prime (66331061).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66331051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62286 + ... + 63341.

Almost surely, 2^66331056 is an apocalyptic number.

66331056 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66331056 is an abundant number, since it is smaller than the sum of its proper divisors (120603408).

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

66331056 is a wasteful number, since it uses less digits than its factorization.

66331056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125649 (or 125643 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 66331056 is about 8144.3880064742. The cubic root of 66331056 is about 404.7985707689.

It can be divided in two parts, 663310 and 56, that added together give a palindrome (663366).

The spelling of 66331056 in words is "sixty-six million, three hundred thirty-one thousand, fifty-six".