66233087974956 has 192 divisors, whose sum is σ = 186670003709952. Its totient is φ = 17869215817728.

The previous prime is 66233087974909. The next prime is 66233087974981. The reversal of 66233087974956 is 65947978033266.

It is a super-2 number, since 2×66233087974956² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73954270 + ... + 74844506.

It is an arithmetic number, because the mean of its divisors is an integer number (972239602656).

Almost surely, 2^{66233087974956} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66233087974956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93335001854976).

66233087974956 is an abundant number, since it is smaller than the sum of its proper divisors (120436915734996).

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

66233087974956 is a wasteful number, since it uses less digits than its factorization.

66233087974956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890768 (or 890766 counting only the distinct ones).

The product of its (nonzero) digits is 2469035520, while the sum is 75.

The spelling of 66233087974956 in words is "sixty-six trillion, two hundred thirty-three billion, eighty-seven million, nine hundred seventy-four thousand, nine hundred fifty-six".