166660751 has 2 divisors, whose sum is σ = 166660752. Its totient is φ = 166660750.

The previous prime is 166660729. The next prime is 166660759. The reversal of 166660751 is 157066661.

It is a strong prime.

It is an emirp because it is prime and its reverse (157066661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166660751 - 2¹⁴ = 166644367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166660759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83330375 + 83330376.

It is an arithmetic number, because the mean of its divisors is an integer number (83330376).

Almost surely, 2^166660751 is an apocalyptic number.

166660751 is a deficient number, since it is larger than the sum of its proper divisors (1).

166660751 is an equidigital number, since it uses as much as digits as its factorization.

166660751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 166660751 is about 12909.7153725402. The cubic root of 166660751 is about 550.3146970384.

The spelling of 166660751 in words is "one hundred sixty-six million, six hundred sixty thousand, seven hundred fifty-one".