799166661997 has 12 divisors (see below), whose sum is σ = 924655644640. Its totient is φ = 688277505960.

The previous prime is 799166661989. The next prime is 799166662003.

799166661997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 799166661997 - 2³ = 799166661989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799166661967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173805153 + ... + 173809750.

Almost surely, 2^799166661997 is an apocalyptic number.

It is an amenable number.

799166661997 is a deficient number, since it is larger than the sum of its proper divisors (125488982643).

799166661997 is a wasteful number, since it uses less digits than its factorization.

799166661997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347614944 (or 347614933 counting only the distinct ones).

The product of its digits is 416649744, while the sum is 76.

The spelling of 799166661997 in words is "seven hundred ninety-nine billion, one hundred sixty-six million, six hundred sixty-one thousand, nine hundred ninety-seven".