966639979 has 2 divisors, whose sum is σ = 966639980. Its totient is φ = 966639978.

The previous prime is 966639967. The next prime is 966640061. The reversal of 966639979 is 979936669.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 966639979 - 2⁷ = 966639851 is a prime.

It is a super-2 number, since 2×966639979² = 1868785698002240882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 966639979.

It is not a weakly prime, because it can be changed into another prime (966639379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483319989 + 483319990.

It is an arithmetic number, because the mean of its divisors is an integer number (483319990).

Almost surely, 2^966639979 is an apocalyptic number.

966639979 is a deficient number, since it is larger than the sum of its proper divisors (1).

966639979 is an equidigital number, since it uses as much as digits as its factorization.

966639979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29760696, while the sum is 64.

The square root of 966639979 is about 31090.8343246044. The cubic root of 966639979 is about 988.7539944635.

The spelling of 966639979 in words is "nine hundred sixty-six million, six hundred thirty-nine thousand, nine hundred seventy-nine".