66168707 has 4 divisors (see below), whose sum is σ = 72184056. Its totient is φ = 60153360.

The previous prime is 66168673. The next prime is 66168721. The reversal of 66168707 is 70786166.

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 66168707 - 2⁸ = 66168451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66168727) 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, 3007658 + ... + 3007679.

It is an arithmetic number, because the mean of its divisors is an integer number (18046014).

Almost surely, 2^66168707 is an apocalyptic number.

66168707 is a deficient number, since it is larger than the sum of its proper divisors (6015349).

66168707 is a wasteful number, since it uses less digits than its factorization.

66168707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015348.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 66168707 is about 8134.4149758910. The cubic root of 66168707 is about 404.4680451858.

The spelling of 66168707 in words is "sixty-six million, one hundred sixty-eight thousand, seven hundred seven".