16665373839967 has 2 divisors, whose sum is σ = 16665373839968. Its totient is φ = 16665373839966.

The previous prime is 16665373839911. The next prime is 16665373840009. The reversal of 16665373839967 is 76993837356661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16665373839967 - 2²³ = 16665365451359 is a prime.

It is a super-2 number, since 2×16665373839967² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16665373833967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332686919983 + 8332686919984.

It is an arithmetic number, because the mean of its divisors is an integer number (8332686919984).

Almost surely, 2^{16665373839967} is an apocalyptic number.

16665373839967 is a deficient number, since it is larger than the sum of its proper divisors (1).

16665373839967 is an equidigital number, since it uses as much as digits as its factorization.

16665373839967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5555329920, while the sum is 79.

The spelling of 16665373839967 in words is "sixteen trillion, six hundred sixty-five billion, three hundred seventy-three million, eight hundred thirty-nine thousand, nine hundred sixty-seven".