666121152274674 has 32 divisors (see below), whose sum is σ = 1368281439752640. Its totient is φ = 216034147403712.

The previous prime is 666121152274639. The next prime is 666121152274703. The reversal of 666121152274674 is 476472251121666.

666121152274674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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, 26382844 + ... + 45036615.

It is an arithmetic number, because the mean of its divisors is an integer number (42758794992270).

Almost surely, 2^{666121152274674} is an apocalyptic number.

666121152274674 is an abundant number, since it is smaller than the sum of its proper divisors (702160287477966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666121152274674 is a wasteful number, since it uses less digits than its factorization.

666121152274674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71461514.

The product of its digits is 40642560, while the sum is 60.

The spelling of 666121152274674 in words is "six hundred sixty-six trillion, one hundred twenty-one billion, one hundred fifty-two million, two hundred seventy-four thousand, six hundred seventy-four".