661124670 has 32 divisors (see below), whose sum is σ = 1587990528. Its totient is φ = 176156448.

The previous prime is 661124669. The next prime is 661124683. The reversal of 661124670 is 76421166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31507 + ... + 48113.

It is an arithmetic number, because the mean of its divisors is an integer number (49624704).

Almost surely, 2^661124670 is an apocalyptic number.

661124670 is an abundant number, since it is smaller than the sum of its proper divisors (926865858).

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

661124670 is a wasteful number, since it uses less digits than its factorization.

661124670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17944.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 661124670 is about 25712.3447005519. The cubic root of 661124670 is about 871.1530358453.

The spelling of 661124670 in words is "six hundred sixty-one million, one hundred twenty-four thousand, six hundred seventy".