66231079 has 4 divisors (see below), whose sum is σ = 67480776. Its totient is φ = 64981384.

The previous prime is 66231059. The next prime is 66231089. The reversal of 66231079 is 97013266.

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 66231079 - 2⁵ = 66231047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66231019) 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, 624769 + ... + 624874.

It is an arithmetic number, because the mean of its divisors is an integer number (16870194).

Almost surely, 2^66231079 is an apocalyptic number.

66231079 is a deficient number, since it is larger than the sum of its proper divisors (1249697).

66231079 is a wasteful number, since it uses less digits than its factorization.

66231079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249696.

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

The square root of 66231079 is about 8138.2479072587. The cubic root of 66231079 is about 404.5950919402.

The spelling of 66231079 in words is "sixty-six million, two hundred thirty-one thousand, seventy-nine".