667746427776135 has 16 divisors (see below), whose sum is σ = 1069172430348384. Its totient is φ = 355872046178432.

The previous prime is 667746427776053. The next prime is 667746427776149. The reversal of 667746427776135 is 531677724647766.

It is a cyclic number.

It is not a de Polignac number, because 667746427776135 - 2⁴⁹ = 104796474354823 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16211351772 + ... + 16211392961.

It is an arithmetic number, because the mean of its divisors is an integer number (66823276896774).

Almost surely, 2^{667746427776135} is an apocalyptic number.

667746427776135 is a deficient number, since it is larger than the sum of its proper divisors (401426002572249).

667746427776135 is a wasteful number, since it uses less digits than its factorization.

667746427776135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32422746114.

The product of its digits is 10455298560, while the sum is 78.

The spelling of 667746427776135 in words is "six hundred sixty-seven trillion, seven hundred forty-six billion, four hundred twenty-seven million, seven hundred seventy-six thousand, one hundred thirty-five".