336721663 has 2 divisors, whose sum is σ = 336721664. Its totient is φ = 336721662.

The previous prime is 336721631. The next prime is 336721681. The reversal of 336721663 is 366127633.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 336721663 - 2⁵ = 336721631 is a prime.

It is a super-2 number, since 2×336721663² = 226762956666971138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (336721613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168360831 + 168360832.

It is an arithmetic number, because the mean of its divisors is an integer number (168360832).

Almost surely, 2^336721663 is an apocalyptic number.

336721663 is a deficient number, since it is larger than the sum of its proper divisors (1).

336721663 is an equidigital number, since it uses as much as digits as its factorization.

336721663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 37.

The square root of 336721663 is about 18349.9771934463. The cubic root of 336721663 is about 695.7026952507.

The spelling of 336721663 in words is "three hundred thirty-six million, seven hundred twenty-one thousand, six hundred sixty-three".