66625629380 has 48 divisors (see below), whose sum is σ = 140832457920. Its totient is φ = 26475566208.

The previous prime is 66625629359. The next prime is 66625629383. The reversal of 66625629380 is 8392652666.

It is a happy number.

It is a super-2 number, since 2×66625629380² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66625629383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3904427 + ... + 3921453.

It is an arithmetic number, because the mean of its divisors is an integer number (2934009540).

Almost surely, 2^66625629380 is an apocalyptic number.

It is an amenable number.

66625629380 is an abundant number, since it is smaller than the sum of its proper divisors (74206828540).

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

66625629380 is a wasteful number, since it uses less digits than its factorization.

66625629380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18308 (or 18306 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 66625629380 in words is "sixty-six billion, six hundred twenty-five million, six hundred twenty-nine thousand, three hundred eighty".