663399079 has 32 divisors (see below), whose sum is σ = 816168960. Its totient is φ = 526629600.

The previous prime is 663399071. The next prime is 663399133. The reversal of 663399079 is 970993366.

It is not a de Polignac number, because 663399079 - 2³ = 663399071 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 (663399071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1538994 + ... + 1539424.

It is an arithmetic number, because the mean of its divisors is an integer number (25505280).

Almost surely, 2^663399079 is an apocalyptic number.

663399079 is a deficient number, since it is larger than the sum of its proper divisors (152769881).

663399079 is a wasteful number, since it uses less digits than its factorization.

663399079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691.

The product of its (nonzero) digits is 1653372, while the sum is 52.

The square root of 663399079 is about 25756.5346853959. The cubic root of 663399079 is about 872.1508761568.

The spelling of 663399079 in words is "six hundred sixty-three million, three hundred ninety-nine thousand, seventy-nine".