666677575 has 12 divisors (see below), whose sum is σ = 838325808. Its totient is φ = 525828800.

The previous prime is 666677569. The next prime is 666677587. The reversal of 666677575 is 575776666.

It is not a de Polignac number, because 666677575 - 2¹⁵ = 666644807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186022 + ... + 189571.

It is an arithmetic number, because the mean of its divisors is an integer number (69860484).

Almost surely, 2^666677575 is an apocalyptic number.

666677575 is a deficient number, since it is larger than the sum of its proper divisors (171648233).

666677575 is a wasteful number, since it uses less digits than its factorization.

666677575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375674 (or 375669 counting only the distinct ones).

The product of its digits is 11113200, while the sum is 55.

The square root of 666677575 is about 25820.1002128187. The cubic root of 666677575 is about 873.5852293638.

Subtracting from 666677575 its reverse (575776666), we obtain a palindrome (90900909).

The spelling of 666677575 in words is "six hundred sixty-six million, six hundred seventy-seven thousand, five hundred seventy-five".