666125611354 has 16 divisors (see below), whose sum is σ = 1142896565376. Its totient is φ = 285240668400.

The previous prime is 666125611303. The next prime is 666125611387. The reversal of 666125611354 is 453116521666.

It is a happy 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, 20127582 + ... + 20160649.

It is an arithmetic number, because the mean of its divisors is an integer number (71431035336).

Almost surely, 2^666125611354 is an apocalyptic number.

666125611354 is a deficient number, since it is larger than the sum of its proper divisors (476770954022).

666125611354 is a wasteful number, since it uses less digits than its factorization.

666125611354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40289421.

The product of its digits is 777600, while the sum is 46.

The spelling of 666125611354 in words is "six hundred sixty-six billion, one hundred twenty-five million, six hundred eleven thousand, three hundred fifty-four".