667440067077 has 48 divisors (see below), whose sum is σ = 1184472207360. Its totient is φ = 353633229216.

The previous prime is 667440067069. The next prime is 667440067079. The reversal of 667440067077 is 770760044766.

667440067077 is a `hidden beast` number, since 6 + 67 + 440 + 0 + 6 + 70 + 77 = 666.

It is not a de Polignac number, because 667440067077 - 2³ = 667440067069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667440067079) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5875593 + ... + 5988110.

It is an arithmetic number, because the mean of its divisors is an integer number (24676504320).

Almost surely, 2^667440067077 is an apocalyptic number.

It is an amenable number.

667440067077 is a deficient number, since it is larger than the sum of its proper divisors (517032140283).

667440067077 is a wasteful number, since it uses less digits than its factorization.

667440067077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11863782 (or 11863779 counting only the distinct ones).

The product of its (nonzero) digits is 8297856, while the sum is 54.

The spelling of 667440067077 in words is "six hundred sixty-seven billion, four hundred forty million, sixty-seven thousand, seventy-seven".