66667130 has 16 divisors (see below), whose sum is σ = 121239720. Its totient is φ = 26391552.

The previous prime is 66667129. The next prime is 66667147. The reversal of 66667130 is 3176666.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55249489 + 11417641 = 7433^2 + 3379^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33395 + ... + 35334.

Almost surely, 2^66667130 is an apocalyptic number.

66667130 is a deficient number, since it is larger than the sum of its proper divisors (54572590).

66667130 is a wasteful number, since it uses less digits than its factorization.

66667130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68833.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66667130 is about 8164.9941824841. The cubic root of 66667130 is about 405.4810723984.

The spelling of 66667130 in words is "sixty-six million, six hundred sixty-seven thousand, one hundred thirty".