66320079 has 16 divisors (see below), whose sum is σ = 103123200. Its totient is φ = 37896600.

The previous prime is 66320057. The next prime is 66320101. The reversal of 66320079 is 97002366.

It is an interprime number because it is at equal distance from previous prime (66320057) and next prime (66320101).

It is not a de Polignac number, because 66320079 - 2¹⁹ = 65795791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66320879) 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, 31197 + ... + 33254.

It is an arithmetic number, because the mean of its divisors is an integer number (6445200).

Almost surely, 2^66320079 is an apocalyptic number.

66320079 is a deficient number, since it is larger than the sum of its proper divisors (36803121).

66320079 is an equidigital number, since it uses as much as digits as its factorization.

66320079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64475 (or 64461 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 66320079 is about 8143.7140789691. The cubic root of 66320079 is about 404.7762397557.

The spelling of 66320079 in words is "sixty-six million, three hundred twenty thousand, seventy-nine".