66130667 has 4 divisors (see below), whose sum is σ = 66318360. Its totient is φ = 65942976.

The previous prime is 66130661. The next prime is 66130679. The reversal of 66130667 is 76603166.

It is a happy number.

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 66130667 - 2¹⁴ = 66114283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66130661) 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, 93317 + ... + 94022.

It is an arithmetic number, because the mean of its divisors is an integer number (16579590).

Almost surely, 2^66130667 is an apocalyptic number.

66130667 is a deficient number, since it is larger than the sum of its proper divisors (187693).

66130667 is a wasteful number, since it uses less digits than its factorization.

66130667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187692.

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

The square root of 66130667 is about 8132.0764261042. The cubic root of 66130667 is about 404.3905215621.

The spelling of 66130667 in words is "sixty-six million, one hundred thirty thousand, six hundred sixty-seven".