39665067545057 has 2 divisors, whose sum is σ = 39665067545058. Its totient is φ = 39665067545056.

The previous prime is 39665067545029. The next prime is 39665067545101. The reversal of 39665067545057 is 75054576056693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31446703045696 + 8218364499361 = 5607736^2 + 2866769^2 .

It is a cyclic number.

It is not a de Polignac number, because 39665067545057 - 2¹² = 39665067540961 is a prime.

It is not a weakly prime, because it can be changed into another prime (39665067545017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19832533772528 + 19832533772529.

It is an arithmetic number, because the mean of its divisors is an integer number (19832533772529).

Almost surely, 2^{39665067545057} is an apocalyptic number.

It is an amenable number.

39665067545057 is a deficient number, since it is larger than the sum of its proper divisors (1).

39665067545057 is an equidigital number, since it uses as much as digits as its factorization.

39665067545057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420000, while the sum is 68.

The spelling of 39665067545057 in words is "thirty-nine trillion, six hundred sixty-five billion, sixty-seven million, five hundred forty-five thousand, fifty-seven".