799666657 has 8 divisors (see below), whose sum is σ = 819721760. Its totient is φ = 779677920.

The previous prime is 799666649. The next prime is 799666667. The reversal of 799666657 is 756666997.

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 799666657 - 2³ = 799666649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 799666595 and 799666604.

It is not an unprimeable number, because it can be changed into a prime (799666667) 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, 8269 + ... + 40837.

It is an arithmetic number, because the mean of its divisors is an integer number (102465220).

Almost surely, 2^799666657 is an apocalyptic number.

It is an amenable number.

799666657 is a deficient number, since it is larger than the sum of its proper divisors (20055103).

799666657 is a wasteful number, since it uses less digits than its factorization.

799666657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33183.

The product of its digits is 25719120, while the sum is 61.

The square root of 799666657 is about 28278.3779060964. The cubic root of 799666657 is about 928.1888120478.

The spelling of 799666657 in words is "seven hundred ninety-nine million, six hundred sixty-six thousand, six hundred fifty-seven".