661270416250 has 40 divisors (see below), whose sum is σ = 1279468738944. Its totient is φ = 255975630000.

The previous prime is 661270416199. The next prime is 661270416283. The reversal of 661270416250 is 52614072166.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8493772 + ... + 8571271.

Almost surely, 2^661270416250 is an apocalyptic number.

661270416250 is a deficient number, since it is larger than the sum of its proper divisors (618198322694).

661270416250 is a wasteful number, since it uses less digits than its factorization.

661270416250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17065096 (or 17065081 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 661270416250 in words is "six hundred sixty-one billion, two hundred seventy million, four hundred sixteen thousand, two hundred fifty".