166233740437 has 2 divisors, whose sum is σ = 166233740438. Its totient is φ = 166233740436.

The previous prime is 166233740369. The next prime is 166233740467. The reversal of 166233740437 is 734047332661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146872131121 + 19361609316 = 383239^2 + 139146^2 .

It is a cyclic number.

It is not a de Polignac number, because 166233740437 - 2¹⁵ = 166233707669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166233740467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83116870218 + 83116870219.

It is an arithmetic number, because the mean of its divisors is an integer number (83116870219).

Almost surely, 2^166233740437 is an apocalyptic number.

It is an amenable number.

166233740437 is a deficient number, since it is larger than the sum of its proper divisors (1).

166233740437 is an equidigital number, since it uses as much as digits as its factorization.

166233740437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 46.

The spelling of 166233740437 in words is "one hundred sixty-six billion, two hundred thirty-three million, seven hundred forty thousand, four hundred thirty-seven".