166351607 has 2 divisors, whose sum is σ = 166351608. Its totient is φ = 166351606.

The previous prime is 166351589. The next prime is 166351609. The reversal of 166351607 is 706153661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (706153661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166351607 is a prime.

Together with 166351609, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166351609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83175803 + 83175804.

It is an arithmetic number, because the mean of its divisors is an integer number (83175804).

Almost surely, 2^166351607 is an apocalyptic number.

166351607 is a deficient number, since it is larger than the sum of its proper divisors (1).

166351607 is an equidigital number, since it uses as much as digits as its factorization.

166351607 is an odious number, because the sum of its binary digits is odd.

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

The square root of 166351607 is about 12897.7365068449. The cubic root of 166351607 is about 549.9742213813.

The spelling of 166351607 in words is "one hundred sixty-six million, three hundred fifty-one thousand, six hundred seven".