20166407377 has 2 divisors, whose sum is σ = 20166407378. Its totient is φ = 20166407376.

The previous prime is 20166407347. The next prime is 20166407381. The reversal of 20166407377 is 77370466102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17361751696 + 2804655681 = 131764^2 + 52959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20166407377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20166407347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10083203688 + 10083203689.

It is an arithmetic number, because the mean of its divisors is an integer number (10083203689).

Almost surely, 2^20166407377 is an apocalyptic number.

It is an amenable number.

20166407377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20166407377 is an equidigital number, since it uses as much as digits as its factorization.

20166407377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 20166407377 in words is "twenty billion, one hundred sixty-six million, four hundred seven thousand, three hundred seventy-seven".