631660620 has 48 divisors (see below), whose sum is σ = 1769912928. Its totient is φ = 168322560.

The previous prime is 631660607. The next prime is 631660649. The reversal of 631660620 is 26066136.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 108832 + ... + 114488.

It is an arithmetic number, because the mean of its divisors is an integer number (36873186).

Almost surely, 2^631660620 is an apocalyptic number.

631660620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631660620 is an abundant number, since it is smaller than the sum of its proper divisors (1138252308).

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

631660620 is a wasteful number, since it uses less digits than its factorization.

631660620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530 (or 7528 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 631660620 is about 25132.8593677679. The cubic root of 631660620 is about 858.0144476243.

The spelling of 631660620 in words is "six hundred thirty-one million, six hundred sixty thousand, six hundred twenty".