166806668 has 24 divisors (see below), whose sum is σ = 334683552. Its totient is φ = 71259264.

The previous prime is 166806667. The next prime is 166806671. The reversal of 166806668 is 866608661.

It is not an unprimeable number, because it can be changed into a prime (166806667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521 + ... + 18272.

It is an arithmetic number, because the mean of its divisors is an integer number (13945148).

Almost surely, 2^166806668 is an apocalyptic number.

It is an amenable number.

166806668 is an abundant number, since it is smaller than the sum of its proper divisors (167876884).

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

166806668 is a wasteful number, since it uses less digits than its factorization.

166806668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19121 (or 19119 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 166806668 is about 12915.3655774817. The cubic root of 166806668 is about 550.4752564290.

The spelling of 166806668 in words is "one hundred sixty-six million, eight hundred six thousand, six hundred sixty-eight".