166605727 has 2 divisors, whose sum is σ = 166605728. Its totient is φ = 166605726.

The previous prime is 166605697. The next prime is 166605739. The reversal of 166605727 is 727506661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166605727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166605727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166605757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83302863 + 83302864.

It is an arithmetic number, because the mean of its divisors is an integer number (83302864).

Almost surely, 2^166605727 is an apocalyptic number.

166605727 is a deficient number, since it is larger than the sum of its proper divisors (1).

166605727 is an equidigital number, since it uses as much as digits as its factorization.

166605727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 166605727 is about 12907.5840884342. The cubic root of 166605727 is about 550.2541271907.

The spelling of 166605727 in words is "one hundred sixty-six million, six hundred five thousand, seven hundred twenty-seven".