165672061 has 2 divisors, whose sum is σ = 165672062. Its totient is φ = 165672060.

The previous prime is 165672007. The next prime is 165672071. The reversal of 165672061 is 160276561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156400036 + 9272025 = 12506^2 + 3045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165672061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165672071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82836030 + 82836031.

It is an arithmetic number, because the mean of its divisors is an integer number (82836031).

Almost surely, 2^165672061 is an apocalyptic number.

It is an amenable number.

165672061 is a deficient number, since it is larger than the sum of its proper divisors (1).

165672061 is an equidigital number, since it uses as much as digits as its factorization.

165672061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 165672061 is about 12871.3659337306. The cubic root of 165672061 is about 549.2243181166.

The spelling of 165672061 in words is "one hundred sixty-five million, six hundred seventy-two thousand, sixty-one".