661934592 has 200 divisors, whose sum is σ = 2156794992. Its totient is φ = 200448000.

The previous prime is 661934579. The next prime is 661934621. The reversal of 661934592 is 295439166.

661934592 is a `hidden beast` number, since 6 + 6 + 193 + 459 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 455467 + ... + 456917.

Almost surely, 2^661934592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661934592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1078397496).

661934592 is an abundant number, since it is smaller than the sum of its proper divisors (1494860400).

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

661934592 is a wasteful number, since it uses less digits than its factorization.

661934592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492 (or 1467 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 661934592 is about 25728.0895520830. The cubic root of 661934592 is about 871.5086309471.

The spelling of 661934592 in words is "six hundred sixty-one million, nine hundred thirty-four thousand, five hundred ninety-two".