166955749 has 2 divisors, whose sum is σ = 166955750. Its totient is φ = 166955748.

The previous prime is 166955741. The next prime is 166955791. The reversal of 166955749 is 947559661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111154849 + 55800900 = 10543^2 + 7470^2 .

It is a cyclic number.

It is not a de Polignac number, because 166955749 - 2³ = 166955741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166955696 and 166955705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166955741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83477874 + 83477875.

It is an arithmetic number, because the mean of its divisors is an integer number (83477875).

Almost surely, 2^166955749 is an apocalyptic number.

It is an amenable number.

166955749 is a deficient number, since it is larger than the sum of its proper divisors (1).

166955749 is an equidigital number, since it uses as much as digits as its factorization.

166955749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 52.

The square root of 166955749 is about 12921.1357472940. The cubic root of 166955749 is about 550.6392006458.

The spelling of 166955749 in words is "one hundred sixty-six million, nine hundred fifty-five thousand, seven hundred forty-nine".