166615037 has 2 divisors, whose sum is σ = 166615038. Its totient is φ = 166615036.

The previous prime is 166615027. The next prime is 166615039. The reversal of 166615037 is 730516661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162970756 + 3644281 = 12766^2 + 1909^2 .

It is a cyclic number.

It is not a de Polignac number, because 166615037 - 2¹⁶ = 166549501 is a prime.

It is a super-2 number, since 2×166615037² = 55521141109022738, which contains 22 as substring.

Together with 166615039, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 166614988 and 166615006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166615039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83307518 + 83307519.

It is an arithmetic number, because the mean of its divisors is an integer number (83307519).

Almost surely, 2^166615037 is an apocalyptic number.

It is an amenable number.

166615037 is a deficient number, since it is larger than the sum of its proper divisors (1).

166615037 is an equidigital number, since it uses as much as digits as its factorization.

166615037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 166615037 is about 12907.9447240837. The cubic root of 166615037 is about 550.2643764792.

The spelling of 166615037 in words is "one hundred sixty-six million, six hundred fifteen thousand, thirty-seven".