166260377 has 2 divisors, whose sum is σ = 166260378. Its totient is φ = 166260376.

The previous prime is 166260361. The next prime is 166260379. The reversal of 166260377 is 773062661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135745801 + 30514576 = 11651^2 + 5524^2 .

It is a cyclic number.

It is not a de Polignac number, because 166260377 - 2⁴ = 166260361 is a prime.

Together with 166260379, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166260377.

It is not a weakly prime, because it can be changed into another prime (166260379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83130188 + 83130189.

It is an arithmetic number, because the mean of its divisors is an integer number (83130189).

Almost surely, 2^166260377 is an apocalyptic number.

It is an amenable number.

166260377 is a deficient number, since it is larger than the sum of its proper divisors (1).

166260377 is an equidigital number, since it uses as much as digits as its factorization.

166260377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 166260377 is about 12894.1993547486. The cubic root of 166260377 is about 549.8736646468.

The spelling of 166260377 in words is "one hundred sixty-six million, two hundred sixty thousand, three hundred seventy-seven".