40002566977 has 2 divisors, whose sum is σ = 40002566978. Its totient is φ = 40002566976.

The previous prime is 40002566939. The next prime is 40002566993. The reversal of 40002566977 is 77966520004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27052354576 + 12950212401 = 164476^2 + 113799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40002566977 is a prime.

It is not a weakly prime, because it can be changed into another prime (40002566777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20001283488 + 20001283489.

It is an arithmetic number, because the mean of its divisors is an integer number (20001283489).

Almost surely, 2^40002566977 is an apocalyptic number.

It is an amenable number.

40002566977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40002566977 is an equidigital number, since it uses as much as digits as its factorization.

40002566977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 40002566977 in words is "forty billion, two million, five hundred sixty-six thousand, nine hundred seventy-seven".