40660131857 has 2 divisors, whose sum is σ = 40660131858. Its totient is φ = 40660131856.

The previous prime is 40660131829. The next prime is 40660131899. The reversal of 40660131857 is 75813106604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32437450816 + 8222681041 = 180104^2 + 90679^2 .

It is a cyclic number.

It is not a de Polignac number, because 40660131857 - 2⁶ = 40660131793 is a prime.

It is not a weakly prime, because it can be changed into another prime (40660101857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20330065928 + 20330065929.

It is an arithmetic number, because the mean of its divisors is an integer number (20330065929).

Almost surely, 2^40660131857 is an apocalyptic number.

It is an amenable number.

40660131857 is a deficient number, since it is larger than the sum of its proper divisors (1).

40660131857 is an equidigital number, since it uses as much as digits as its factorization.

40660131857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 40660131857 in words is "forty billion, six hundred sixty million, one hundred thirty-one thousand, eight hundred fifty-seven".