166564751 has 2 divisors, whose sum is σ = 166564752. Its totient is φ = 166564750.

The previous prime is 166564733. The next prime is 166564763. The reversal of 166564751 is 157465661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166564751 - 2⁶ = 166564687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166564699 and 166564708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166564771) 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, 83282375 + 83282376.

It is an arithmetic number, because the mean of its divisors is an integer number (83282376).

Almost surely, 2^166564751 is an apocalyptic number.

166564751 is a deficient number, since it is larger than the sum of its proper divisors (1).

166564751 is an equidigital number, since it uses as much as digits as its factorization.

166564751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 166564751 is about 12905.9967069576. The cubic root of 166564751 is about 550.2090125714.

The spelling of 166564751 in words is "one hundred sixty-six million, five hundred sixty-four thousand, seven hundred fifty-one".