66666674067 has 32 divisors (see below), whose sum is σ = 104903631360. Its totient is φ = 36867882240.

The previous prime is 66666674059. The next prime is 66666674077. The reversal of 66666674067 is 76047666666.

It is not a de Polignac number, because 66666674067 - 2³ = 66666674059 is a prime.

It is a super-2 number, since 2×66666674067² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66666674067.

It is not an unprimeable number, because it can be changed into a prime (66666674077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240234 + ... + 437087.

It is an arithmetic number, because the mean of its divisors is an integer number (3278238480).

Almost surely, 2^66666674067 is an apocalyptic number.

66666674067 is a deficient number, since it is larger than the sum of its proper divisors (38236957293).

66666674067 is a wasteful number, since it uses less digits than its factorization.

66666674067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677483.

The product of its (nonzero) digits is 54867456, while the sum is 60.

The spelling of 66666674067 in words is "sixty-six billion, six hundred sixty-six million, six hundred seventy-four thousand, sixty-seven".