662481979 has 2 divisors, whose sum is σ = 662481980. Its totient is φ = 662481978.

The previous prime is 662481971. The next prime is 662481983. The reversal of 662481979 is 979184266.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 662481979 - 2³ = 662481971 is a prime.

It is not a weakly prime, because it can be changed into another prime (662481971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331240989 + 331240990.

It is an arithmetic number, because the mean of its divisors is an integer number (331240990).

Almost surely, 2^662481979 is an apocalyptic number.

662481979 is a deficient number, since it is larger than the sum of its proper divisors (1).

662481979 is an equidigital number, since it uses as much as digits as its factorization.

662481979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 662481979 is about 25738.7252792363. The cubic root of 662481979 is about 871.7487961949.

The spelling of 662481979 in words is "six hundred sixty-two million, four hundred eighty-one thousand, nine hundred seventy-nine".