66328377 has 4 divisors (see below), whose sum is σ = 88437840. Its totient is φ = 44218916.

The previous prime is 66328363. The next prime is 66328391. The reversal of 66328377 is 77382366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (66328363) and next prime (66328391).

It is a cyclic number.

It is not a de Polignac number, because 66328377 - 2⁸ = 66328121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66328397) 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, 11054727 + ... + 11054732.

It is an arithmetic number, because the mean of its divisors is an integer number (22109460).

Almost surely, 2^66328377 is an apocalyptic number.

It is an amenable number.

66328377 is a deficient number, since it is larger than the sum of its proper divisors (22109463).

66328377 is a wasteful number, since it uses less digits than its factorization.

66328377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22109462.

The product of its digits is 254016, while the sum is 42.

The square root of 66328377 is about 8144.2235357338. The cubic root of 66328377 is about 404.7931209839.

The spelling of 66328377 in words is "sixty-six million, three hundred twenty-eight thousand, three hundred seventy-seven".