166057651 has 2 divisors, whose sum is σ = 166057652. Its totient is φ = 166057650.

The previous prime is 166057637. The next prime is 166057679. The reversal of 166057651 is 156750661.

It is a weak prime.

It is an emirp because it is prime and its reverse (156750661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166057651 - 2⁷ = 166057523 is a prime.

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 166057651.

It is not a weakly prime, because it can be changed into another prime (166057621) 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, 83028825 + 83028826.

It is an arithmetic number, because the mean of its divisors is an integer number (83028826).

Almost surely, 2^166057651 is an apocalyptic number.

166057651 is a deficient number, since it is larger than the sum of its proper divisors (1).

166057651 is an equidigital number, since it uses as much as digits as its factorization.

166057651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 166057651 is about 12886.3358252065. The cubic root of 166057651 is about 549.6500815560.

The spelling of 166057651 in words is "one hundred sixty-six million, fifty-seven thousand, six hundred fifty-one".