661173296 has 20 divisors (see below), whose sum is σ = 1464026832. Its totient is φ = 283359936.

The previous prime is 661173287. The next prime is 661173311. The reversal of 661173296 is 692371166.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2951555 + ... + 2951778.

Almost surely, 2^661173296 is an apocalyptic number.

It is an amenable number.

661173296 is an abundant number, since it is smaller than the sum of its proper divisors (802853536).

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

661173296 is a wasteful number, since it uses less digits than its factorization.

661173296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903348 (or 5903342 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 661173296 is about 25713.2902600970. The cubic root of 661173296 is about 871.1743932135.

The spelling of 661173296 in words is "six hundred sixty-one million, one hundred seventy-three thousand, two hundred ninety-six".