661080052 has 12 divisors (see below), whose sum is σ = 1157479456. Its totient is φ = 330371640.

The previous prime is 661080031. The next prime is 661080083. The reversal of 661080052 is 250080166.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 661080052.

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, 33048 + ... + 49135.

Almost surely, 2^661080052 is an apocalyptic number.

It is an amenable number.

661080052 is a deficient number, since it is larger than the sum of its proper divisors (496399404).

661080052 is a wasteful number, since it uses less digits than its factorization.

661080052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84198 (or 84196 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 661080052 is about 25711.4770481978. The cubic root of 661080052 is about 871.1334379377.

The spelling of 661080052 in words is "six hundred sixty-one million, eighty thousand, fifty-two".