2366137981 has 2 divisors, whose sum is σ = 2366137982. Its totient is φ = 2366137980.

The previous prime is 2366137951. The next prime is 2366137993. The reversal of 2366137981 is 1897316632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2335788900 + 30349081 = 48330^2 + 5509^2 .

It is a cyclic number.

It is not a de Polignac number, because 2366137981 - 2¹⁹ = 2365613693 is a prime.

It is a super-2 number, since 2×2366137981² = 11197217890261512722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2366137951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1183068990 + 1183068991.

It is an arithmetic number, because the mean of its divisors is an integer number (1183068991).

Almost surely, 2^2366137981 is an apocalyptic number.

It is an amenable number.

2366137981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2366137981 is an equidigital number, since it uses as much as digits as its factorization.

2366137981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 2366137981 is about 48642.9643525145. The cubic root of 2366137981 is about 1332.5392875387.

The spelling of 2366137981 in words is "two billion, three hundred sixty-six million, one hundred thirty-seven thousand, nine hundred eighty-one".