16660979 has 2 divisors, whose sum is σ = 16660980. Its totient is φ = 16660978.

The previous prime is 16660961. The next prime is 16661083. The reversal of 16660979 is 97906661.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97906661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16660979 - 2⁸ = 16660723 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (16660939) 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, 8330489 + 8330490.

It is an arithmetic number, because the mean of its divisors is an integer number (8330490).

Almost surely, 2^16660979 is an apocalyptic number.

16660979 is a deficient number, since it is larger than the sum of its proper divisors (1).

16660979 is an equidigital number, since it uses as much as digits as its factorization.

16660979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 16660979 is about 4081.7862511405. The cubic root of 16660979 is about 255.4074174078.

The spelling of 16660979 in words is "sixteen million, six hundred sixty thousand, nine hundred seventy-nine".