66006666674 has 16 divisors (see below), whose sum is σ = 106643983488. Its totient is φ = 30459521232.

The previous prime is 66006666623. The next prime is 66006666701. The reversal of 66006666674 is 47666660066.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51482 + ... + 366965.

It is an arithmetic number, because the mean of its divisors is an integer number (6665248968).

Almost surely, 2^66006666674 is an apocalyptic number.

66006666674 is a deficient number, since it is larger than the sum of its proper divisors (40637316814).

66006666674 is a wasteful number, since it uses less digits than its factorization.

66006666674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424529.

The product of its (nonzero) digits is 7838208, while the sum is 53.

The spelling of 66006666674 in words is "sixty-six billion, six million, six hundred sixty-six thousand, six hundred seventy-four".