63125712666 has 40 divisors (see below), whose sum is σ = 143238870720. Its totient is φ = 20775546792.

The previous prime is 63125712659. The next prime is 63125712667. The reversal of 63125712666 is 66621752136.

It is not an unprimeable number, because it can be changed into a prime (63125712667) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2453436 + ... + 2479031.

It is an arithmetic number, because the mean of its divisors is an integer number (3580971768).

Almost surely, 2^63125712666 is an apocalyptic number.

63125712666 is an abundant number, since it is smaller than the sum of its proper divisors (80113158054).

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

63125712666 is a wasteful number, since it uses less digits than its factorization.

63125712666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932560 (or 4932551 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 63125712666 in words is "sixty-three billion, one hundred twenty-five million, seven hundred twelve thousand, six hundred sixty-six".