661852528 has 20 divisors (see below), whose sum is σ = 1282854400. Its totient is φ = 330793344.

The previous prime is 661852493. The next prime is 661852537. The reversal of 661852528 is 825258166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42001 + ... + 55567.

It is an arithmetic number, because the mean of its divisors is an integer number (64142720).

Almost surely, 2^661852528 is an apocalyptic number.

It is an amenable number.

661852528 is a deficient number, since it is larger than the sum of its proper divisors (621001872).

661852528 is a wasteful number, since it uses less digits than its factorization.

661852528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16624 (or 16618 counting only the distinct ones).

The product of its digits is 230400, while the sum is 43.

The square root of 661852528 is about 25726.4946698924. The cubic root of 661852528 is about 871.4726140753.

The spelling of 661852528 in words is "six hundred sixty-one million, eight hundred fifty-two thousand, five hundred twenty-eight".