667880612276405 has 64 divisors (see below), whose sum is σ = 893950650187776. Its totient is φ = 474847467840000.

The previous prime is 667880612276401. The next prime is 667880612276431. The reversal of 667880612276405 is 504672216088766.

It is not a de Polignac number, because 667880612276405 - 2² = 667880612276401 is a prime.

It is a super-2 number, since 2×667880612276405² (a number of 30 digits) 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 (667880612276401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33009460169 + ... + 33009480401.

It is an arithmetic number, because the mean of its divisors is an integer number (13967978909184).

Almost surely, 2^{667880612276405} is an apocalyptic number.

It is an amenable number.

667880612276405 is a deficient number, since it is larger than the sum of its proper divisors (226070037911371).

667880612276405 is a wasteful number, since it uses less digits than its factorization.

667880612276405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34418.

The product of its (nonzero) digits is 325140480, while the sum is 68.

The spelling of 667880612276405 in words is "six hundred sixty-seven trillion, eight hundred eighty billion, six hundred twelve million, two hundred seventy-six thousand, four hundred five".