165680153 has 2 divisors, whose sum is σ = 165680154. Its totient is φ = 165680152.

The previous prime is 165680149. The next prime is 165680159. The reversal of 165680153 is 351086561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145636624 + 20043529 = 12068^2 + 4477^2 .

It is a cyclic number.

It is not a de Polignac number, because 165680153 - 2² = 165680149 is a prime.

It is not a weakly prime, because it can be changed into another prime (165680159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82840076 + 82840077.

It is an arithmetic number, because the mean of its divisors is an integer number (82840077).

Almost surely, 2^165680153 is an apocalyptic number.

It is an amenable number.

165680153 is a deficient number, since it is larger than the sum of its proper divisors (1).

165680153 is an equidigital number, since it uses as much as digits as its factorization.

165680153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 165680153 is about 12871.6802710446. The cubic root of 165680153 is about 549.2332599800.

The spelling of 165680153 in words is "one hundred sixty-five million, six hundred eighty thousand, one hundred fifty-three".