666064677 has 4 divisors (see below), whose sum is σ = 888086240. Its totient is φ = 444043116.

The previous prime is 666064669. The next prime is 666064681. The reversal of 666064677 is 776460666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 666064677 - 2³ = 666064669 is a prime.

It is a super-2 number, since 2×666064677² = 887284307894228658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666064877) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 111010777 + ... + 111010782.

It is an arithmetic number, because the mean of its divisors is an integer number (222021560).

Almost surely, 2^666064677 is an apocalyptic number.

It is an amenable number.

666064677 is a deficient number, since it is larger than the sum of its proper divisors (222021563).

666064677 is a wasteful number, since it uses less digits than its factorization.

666064677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222021562.

The product of its (nonzero) digits is 1524096, while the sum is 48.

The square root of 666064677 is about 25808.2288621285. The cubic root of 666064677 is about 873.3174423456.

The spelling of 666064677 in words is "six hundred sixty-six million, sixty-four thousand, six hundred seventy-seven".