662216979 has 4 divisors (see below), whose sum is σ = 882955976. Its totient is φ = 441477984.

The previous prime is 662216977. The next prime is 662216983. The reversal of 662216979 is 979612266.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 662216979 - 2¹ = 662216977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662216977) 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, 110369494 + ... + 110369499.

It is an arithmetic number, because the mean of its divisors is an integer number (220738994).

Almost surely, 2^662216979 is an apocalyptic number.

662216979 is a deficient number, since it is larger than the sum of its proper divisors (220738997).

662216979 is a wasteful number, since it uses less digits than its factorization.

662216979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220738996.

The product of its digits is 489888, while the sum is 48.

The square root of 662216979 is about 25733.5768792448. The cubic root of 662216979 is about 871.6325443582.

The spelling of 662216979 in words is "six hundred sixty-two million, two hundred sixteen thousand, nine hundred seventy-nine".