660872797 has 8 divisors (see below), whose sum is σ = 715438080. Its totient is φ = 606840240.

The previous prime is 660872789. The next prime is 660872803. The reversal of 660872797 is 797278066.

It is a happy number.

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 660872797 - 2³ = 660872789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660872897) 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, 130597 + ... + 135562.

It is an arithmetic number, because the mean of its divisors is an integer number (89429760).

Almost surely, 2^660872797 is an apocalyptic number.

It is an amenable number.

660872797 is a deficient number, since it is larger than the sum of its proper divisors (54565283).

660872797 is a wasteful number, since it uses less digits than its factorization.

660872797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266363.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The square root of 660872797 is about 25707.4463336987. The cubic root of 660872797 is about 871.0423921653.

The spelling of 660872797 in words is "six hundred sixty million, eight hundred seventy-two thousand, seven hundred ninety-seven".