661625502634 has 16 divisors (see below), whose sum is σ = 1019386333728. Its totient is φ = 321949034352.

The previous prime is 661625502613. The next prime is 661625502641. The reversal of 661625502634 is 436205526166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29732877 + ... + 29755120.

It is an arithmetic number, because the mean of its divisors is an integer number (63711645858).

Almost surely, 2^661625502634 is an apocalyptic number.

661625502634 is a deficient number, since it is larger than the sum of its proper divisors (357760831094).

661625502634 is a wasteful number, since it uses less digits than its factorization.

661625502634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59488149.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 661625502634 in words is "six hundred sixty-one billion, six hundred twenty-five million, five hundred two thousand, six hundred thirty-four".