166235501 has 2 divisors, whose sum is σ = 166235502. Its totient is φ = 166235500.

The previous prime is 166235497. The next prime is 166235533. The reversal of 166235501 is 105532661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164506276 + 1729225 = 12826^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 166235501 - 2² = 166235497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166235591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83117750 + 83117751.

It is an arithmetic number, because the mean of its divisors is an integer number (83117751).

Almost surely, 2^166235501 is an apocalyptic number.

It is an amenable number.

166235501 is a deficient number, since it is larger than the sum of its proper divisors (1).

166235501 is an equidigital number, since it uses as much as digits as its factorization.

166235501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 166235501 is about 12893.2346988644. The cubic root of 166235501 is about 549.8462391115.

The spelling of 166235501 in words is "one hundred sixty-six million, two hundred thirty-five thousand, five hundred one".