40660979 has 2 divisors, whose sum is σ = 40660980. Its totient is φ = 40660978.

The previous prime is 40660951. The next prime is 40661029. The reversal of 40660979 is 97906604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40660979 - 2⁸ = 40660723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40660079) 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, 20330489 + 20330490.

It is an arithmetic number, because the mean of its divisors is an integer number (20330490).

Almost surely, 2^40660979 is an apocalyptic number.

40660979 is a deficient number, since it is larger than the sum of its proper divisors (1).

40660979 is an equidigital number, since it uses as much as digits as its factorization.

40660979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 40660979 is about 6376.5961923271. The cubic root of 40660979 is about 343.8686711372.

The spelling of 40660979 in words is "forty million, six hundred sixty thousand, nine hundred seventy-nine".