666676067 has 4 divisors (see below), whose sum is σ = 666930576. Its totient is φ = 666421560.

The previous prime is 666676057. The next prime is 666676081. The reversal of 666676067 is 760676666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666676067 - 2⁴ = 666676051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666676057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123284 + ... + 128577.

It is an arithmetic number, because the mean of its divisors is an integer number (166732644).

Almost surely, 2^666676067 is an apocalyptic number.

666676067 is a deficient number, since it is larger than the sum of its proper divisors (254509).

666676067 is a wasteful number, since it uses less digits than its factorization.

666676067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254508.

The product of its (nonzero) digits is 2286144, while the sum is 50.

The square root of 666676067 is about 25820.0710107467. The cubic root of 666676067 is about 873.5845706908.

The spelling of 666676067 in words is "six hundred sixty-six million, six hundred seventy-six thousand, sixty-seven".