66132907 has 4 divisors (see below), whose sum is σ = 70023096. Its totient is φ = 62242720.

The previous prime is 66132821. The next prime is 66132929. The reversal of 66132907 is 70923166.

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 66132907 - 2⁷ = 66132779 is a prime.

It is a super-2 number, since 2×66132907² = 8747122776541298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66132947) 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, 1945069 + ... + 1945102.

It is an arithmetic number, because the mean of its divisors is an integer number (17505774).

Almost surely, 2^66132907 is an apocalyptic number.

66132907 is a deficient number, since it is larger than the sum of its proper divisors (3890189).

66132907 is a wasteful number, since it uses less digits than its factorization.

66132907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890188.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66132907 is about 8132.2141511399. The cubic root of 66132907 is about 404.3950873941.

The spelling of 66132907 in words is "sixty-six million, one hundred thirty-two thousand, nine hundred seven".