660796631 has 8 divisors (see below), whose sum is σ = 738451728. Its totient is φ = 586072000.

The previous prime is 660796597. The next prime is 660796691. The reversal of 660796631 is 136697066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660796631 - 2⁶ = 660796567 is a prime.

It is a super-3 number, since 3×660796631³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660796691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732140 + ... + 733041.

It is an arithmetic number, because the mean of its divisors is an integer number (92306466).

Almost surely, 2^660796631 is an apocalyptic number.

660796631 is a deficient number, since it is larger than the sum of its proper divisors (77655097).

660796631 is a wasteful number, since it uses less digits than its factorization.

660796631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465233.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 660796631 is about 25705.9648914411. The cubic root of 660796631 is about 871.0089281543.

The spelling of 660796631 in words is "six hundred sixty million, seven hundred ninety-six thousand, six hundred thirty-one".