661196610 has 48 divisors (see below), whose sum is σ = 1721276856. Its totient is φ = 176097024.

The previous prime is 661196609. The next prime is 661196621. The reversal of 661196610 is 16691166.

It can be written as a sum of positive squares in 4 ways, for example, as 523814769 + 137381841 = 22887^2 + 11721^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74742 + ... + 83118.

Almost surely, 2^661196610 is an apocalyptic number.

661196610 is an abundant number, since it is smaller than the sum of its proper divisors (1060080246).

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

661196610 is a wasteful number, since it uses less digits than its factorization.

661196610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9267 (or 9264 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 661196610 is about 25713.7436014284. The cubic root of 661196610 is about 871.1846327483.

The spelling of 661196610 in words is "six hundred sixty-one million, one hundred ninety-six thousand, six hundred ten".