39766806139477 has 2 divisors, whose sum is σ = 39766806139478. Its totient is φ = 39766806139476.

The previous prime is 39766806139451. The next prime is 39766806139481. The reversal of 39766806139477 is 77493160866793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33713282266596 + 6053523872881 = 5806314^2 + 2460391^2 .

It is a cyclic number.

It is not a de Polignac number, because 39766806139477 - 2³¹ = 39764658655829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39766803139477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19883403069738 + 19883403069739.

It is an arithmetic number, because the mean of its divisors is an integer number (19883403069739).

Almost surely, 2^{39766806139477} is an apocalyptic number.

It is an amenable number.

39766806139477 is a deficient number, since it is larger than the sum of its proper divisors (1).

39766806139477 is an equidigital number, since it uses as much as digits as its factorization.

39766806139477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728324864, while the sum is 76.

The spelling of 39766806139477 in words is "thirty-nine trillion, seven hundred sixty-six billion, eight hundred six million, one hundred thirty-nine thousand, four hundred seventy-seven".