662979 has 8 divisors (see below), whose sum is σ = 888832. Its totient is φ = 439560.

The previous prime is 662957. The next prime is 662999. The reversal of 662979 is 979266.

662979 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 662979 - 2⁵ = 662947 is a prime.

It is a d-powerful number, because it can be written as 6 + 6² + 9² + 2¹⁷ + 7³ + 9⁶ .

It is a Duffinian number.

662979 is strictly pandigital in base 7.

It is not an unprimeable number, because it can be changed into a prime (662939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 1164.

It is an arithmetic number, because the mean of its divisors is an integer number (111104).

2⁶⁶²⁹⁷⁹ is an apocalyptic number.

662979 is a deficient number, since it is larger than the sum of its proper divisors (225853).

662979 is a wasteful number, since it uses less digits than its factorization.

662979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217.

The product of its digits is 40824, while the sum is 39.

The square root of 662979 is about 814.2352239986. The cubic root of 662979 is about 87.1966748865.

The spelling of 662979 in words is "six hundred sixty-two thousand, nine hundred seventy-nine".