166610671 has 2 divisors, whose sum is σ = 166610672. Its totient is φ = 166610670.

The previous prime is 166610657. The next prime is 166610737. The reversal of 166610671 is 176016661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166610671 - 2¹⁵ = 166577903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166610651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83305335 + 83305336.

It is an arithmetic number, because the mean of its divisors is an integer number (83305336).

Almost surely, 2^166610671 is an apocalyptic number.

166610671 is a deficient number, since it is larger than the sum of its proper divisors (1).

166610671 is an equidigital number, since it uses as much as digits as its factorization.

166610671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 166610671 is about 12907.7756023259. The cubic root of 166610671 is about 550.2595700398.

It can be divided in two parts, 166610 and 671, that added together give a square (167281 = 409²).

The spelling of 166610671 in words is "one hundred sixty-six million, six hundred ten thousand, six hundred seventy-one".