660957696 has 240 divisors, whose sum is σ = 2253808128. Its totient is φ = 182476800.

The previous prime is 660957641. The next prime is 660957697. The reversal of 660957696 is 696759066.

660957696 is a `hidden beast` number, since 6 + 60 + 9 + 576 + 9 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (660957697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 999606 + ... + 1000266.

Almost surely, 2^660957696 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 660957696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126904064).

660957696 is an abundant number, since it is smaller than the sum of its proper divisors (1592850432).

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

660957696 is a wasteful number, since it uses less digits than its factorization.

660957696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The square root of 660957696 is about 25709.0975337525. The cubic root of 660957696 is about 871.0796900447.

The spelling of 660957696 in words is "six hundred sixty million, nine hundred fifty-seven thousand, six hundred ninety-six".