665028379 has 4 divisors (see below), whose sum is σ = 665874184. Its totient is φ = 664182576.

The previous prime is 665028373. The next prime is 665028383. The reversal of 665028379 is 973820566.

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 665028379 - 2⁵ = 665028347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665028373) 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, 421722 + ... + 423295.

It is an arithmetic number, because the mean of its divisors is an integer number (166468546).

Almost surely, 2^665028379 is an apocalyptic number.

665028379 is a deficient number, since it is larger than the sum of its proper divisors (845805).

665028379 is an equidigital number, since it uses as much as digits as its factorization.

665028379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845804.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 665028379 is about 25788.1441557938. The cubic root of 665028379 is about 872.8642897146.

The spelling of 665028379 in words is "six hundred sixty-five million, twenty-eight thousand, three hundred seventy-nine".