166651063 has 2 divisors, whose sum is σ = 166651064. Its totient is φ = 166651062.

The previous prime is 166651057. The next prime is 166651087. The reversal of 166651063 is 360156661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166651063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166651003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83325531 + 83325532.

It is an arithmetic number, because the mean of its divisors is an integer number (83325532).

Almost surely, 2^166651063 is an apocalyptic number.

166651063 is a deficient number, since it is larger than the sum of its proper divisors (1).

166651063 is an equidigital number, since it uses as much as digits as its factorization.

166651063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 166651063 is about 12909.3401458014. The cubic root of 166651063 is about 550.3040335557.

The spelling of 166651063 in words is "one hundred sixty-six million, six hundred fifty-one thousand, sixty-three".