661033527472 has 40 divisors (see below), whose sum is σ = 1394648794800. Its totient is φ = 302323859712.

The previous prime is 661033527457. The next prime is 661033527521. The reversal of 661033527472 is 274725330166.

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, 37481743 + ... + 37499374.

It is an arithmetic number, because the mean of its divisors is an integer number (34866219870).

Almost surely, 2^661033527472 is an apocalyptic number.

It is an amenable number.

661033527472 is an abundant number, since it is smaller than the sum of its proper divisors (733615267328).

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

661033527472 is a wasteful number, since it uses less digits than its factorization.

661033527472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74981173 (or 74981167 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 46.

The spelling of 661033527472 in words is "six hundred sixty-one billion, thirty-three million, five hundred twenty-seven thousand, four hundred seventy-two".