666124677 has 12 divisors (see below), whose sum is σ = 963047020. Its totient is φ = 443683008.

The previous prime is 666124607. The next prime is 666124681. The reversal of 666124677 is 776421666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 245423556 + 420701121 = 15666^2 + 20511^2 .

It is not a de Polignac number, because 666124677 - 2²⁰ = 665076101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666124607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22618 + ... + 42939.

Almost surely, 2^666124677 is an apocalyptic number.

It is an amenable number.

666124677 is a deficient number, since it is larger than the sum of its proper divisors (296922343).

666124677 is a wasteful number, since it uses less digits than its factorization.

666124677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66692 (or 66689 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 666124677 is about 25809.3912558975. The cubic root of 666124677 is about 873.3436647607.

It can be divided in two parts, 66612 and 4677, that added together give a square (71289 = 267²).

The spelling of 666124677 in words is "six hundred sixty-six million, one hundred twenty-four thousand, six hundred seventy-seven".