140166465617 has 2 divisors, whose sum is σ = 140166465618. Its totient is φ = 140166465616.

The previous prime is 140166465599. The next prime is 140166465643. The reversal of 140166465617 is 716564661041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137949845056 + 2216620561 = 371416^2 + 47081^2 .

It is a cyclic number.

It is not a de Polignac number, because 140166465617 - 2¹² = 140166461521 is a prime.

It is not a weakly prime, because it can be changed into another prime (140166485617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70083232808 + 70083232809.

It is an arithmetic number, because the mean of its divisors is an integer number (70083232809).

Almost surely, 2^140166465617 is an apocalyptic number.

It is an amenable number.

140166465617 is a deficient number, since it is larger than the sum of its proper divisors (1).

140166465617 is an equidigital number, since it uses as much as digits as its factorization.

140166465617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 140166465617 in words is "one hundred forty billion, one hundred sixty-six million, four hundred sixty-five thousand, six hundred seventeen".