166106561116157 has 2 divisors, whose sum is σ = 166106561116158. Its totient is φ = 166106561116156.

The previous prime is 166106561116109. The next prime is 166106561116183. The reversal of 166106561116157 is 751611165601661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97136675370436 + 68969885745721 = 9855794^2 + 8304811^2 .

It is a cyclic number.

It is not a de Polignac number, because 166106561116157 - 2³⁴ = 166089381246973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166106561116099 and 166106561116108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166106561112157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83053280558078 + 83053280558079.

It is an arithmetic number, because the mean of its divisors is an integer number (83053280558079).

Almost surely, 2^{166106561116157} is an apocalyptic number.

It is an amenable number.

166106561116157 is a deficient number, since it is larger than the sum of its proper divisors (1).

166106561116157 is an equidigital number, since it uses as much as digits as its factorization.

166106561116157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 166106561116157 in words is "one hundred sixty-six trillion, one hundred six billion, five hundred sixty-one million, one hundred sixteen thousand, one hundred fifty-seven".