336666667021 has 2 divisors, whose sum is σ = 336666667022. Its totient is φ = 336666667020.

The previous prime is 336666666989. The next prime is 336666667027. The reversal of 336666667021 is 120766666633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199910928996 + 136755738025 = 447114^2 + 369805^2 .

It is a cyclic number.

It is not a de Polignac number, because 336666667021 - 2⁵ = 336666666989 is a prime.

It is a super-2 number, since 2×336666667021² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 336666667021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (336666667027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168333333510 + 168333333511.

It is an arithmetic number, because the mean of its divisors is an integer number (168333333511).

Almost surely, 2^336666667021 is an apocalyptic number.

It is an amenable number.

336666667021 is a deficient number, since it is larger than the sum of its proper divisors (1).

336666667021 is an equidigital number, since it uses as much as digits as its factorization.

336666667021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 52.

The spelling of 336666667021 in words is "three hundred thirty-six billion, six hundred sixty-six million, six hundred sixty-seven thousand, twenty-one".