166002261 has 16 divisors (see below), whose sum is σ = 228178944. Its totient is φ = 107291504.

The previous prime is 166002217. The next prime is 166002299. The reversal of 166002261 is 162200661.

It is a cyclic number.

It is not a de Polignac number, because 166002261 - 2⁶ = 166002197 is a prime.

It is a super-2 number, since 2×166002261² = 55113501314224242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166002961) 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 in 15 ways as a sum of consecutive naturals, for example, 9586 + ... + 20588.

It is an arithmetic number, because the mean of its divisors is an integer number (14261184).

Almost surely, 2^166002261 is an apocalyptic number.

It is an amenable number.

166002261 is a deficient number, since it is larger than the sum of its proper divisors (62176683).

166002261 is a wasteful number, since it uses less digits than its factorization.

166002261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11160.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 166002261 is about 12884.1864702433. The cubic root of 166002261 is about 549.5889612090.

The spelling of 166002261 in words is "one hundred sixty-six million, two thousand, two hundred sixty-one".