66140679 has 16 divisors (see below), whose sum is σ = 96750720. Its totient is φ = 39857760.

The previous prime is 66140647. The next prime is 66140687. The reversal of 66140679 is 97604166.

It is not a de Polignac number, because 66140679 - 2⁵ = 66140647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66145679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309 + ... + 11505.

It is an arithmetic number, because the mean of its divisors is an integer number (6046920).

Almost surely, 2^66140679 is an apocalyptic number.

66140679 is a deficient number, since it is larger than the sum of its proper divisors (30610041).

66140679 is a wasteful number, since it uses less digits than its factorization.

66140679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11390.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 66140679 is about 8132.6919897412. The cubic root of 66140679 is about 404.4109284010.

The spelling of 66140679 in words is "sixty-six million, one hundred forty thousand, six hundred seventy-nine".