663794351 has 16 divisors (see below), whose sum is σ = 749884416. Its totient is φ = 582120000.

The previous prime is 663794323. The next prime is 663794389. The reversal of 663794351 is 153497366.

It is a happy number.

It is not a de Polignac number, because 663794351 - 2²² = 659600047 is a prime.

It is a super-2 number, since 2×663794351² = 881245880839022402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663794951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109931 + ... + 115811.

It is an arithmetic number, because the mean of its divisors is an integer number (46867776).

Almost surely, 2^663794351 is an apocalyptic number.

663794351 is a deficient number, since it is larger than the sum of its proper divisors (86090065).

663794351 is a wasteful number, since it uses less digits than its factorization.

663794351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6254.

The product of its digits is 408240, while the sum is 44.

The square root of 663794351 is about 25764.2067799496. The cubic root of 663794351 is about 872.3240591808.

The spelling of 663794351 in words is "six hundred sixty-three million, seven hundred ninety-four thousand, three hundred fifty-one".