402668611 has 2 divisors, whose sum is σ = 402668612. Its totient is φ = 402668610.

The previous prime is 402668603. The next prime is 402668621. The reversal of 402668611 is 116866204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402668611 - 2³ = 402668603 is a prime.

It is equal to p_21470929 and since 402668611 and 21470929 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (402668621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201334305 + 201334306.

It is an arithmetic number, because the mean of its divisors is an integer number (201334306).

Almost surely, 2^402668611 is an apocalyptic number.

402668611 is a deficient number, since it is larger than the sum of its proper divisors (1).

402668611 is an equidigital number, since it uses as much as digits as its factorization.

402668611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 402668611 is about 20066.6043714426. The cubic root of 402668611 is about 738.4412104800.

The spelling of 402668611 in words is "four hundred two million, six hundred sixty-eight thousand, six hundred eleven".