667106676 has 18 divisors (see below), whose sum is σ = 1686297522. Its totient is φ = 222368880.

The previous prime is 667106647. The next prime is 667106681. The reversal of 667106676 is 676601766.

It can be written as a sum of positive squares in only one way, i.e., 659154276 + 7952400 = 25674^2 + 2820^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 9265335 + ... + 9265406.

Almost surely, 2^667106676 is an apocalyptic number.

It is an amenable number.

667106676 is an abundant number, since it is smaller than the sum of its proper divisors (1019190846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667106676 is a wasteful number, since it uses less digits than its factorization.

667106676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530751 (or 18530746 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 667106676 is about 25828.4083133282. The cubic root of 667106676 is about 873.7726142477.

The spelling of 667106676 in words is "six hundred sixty-seven million, one hundred six thousand, six hundred seventy-six".