166002461 has 4 divisors (see below), whose sum is σ = 170489052. Its totient is φ = 161515872.

The previous prime is 166002457. The next prime is 166002479. The reversal of 166002461 is 164200661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164200661 = 349 ⋅470489.

It can be written as a sum of positive squares in 2 ways, for example, as 82919236 + 83083225 = 9106^2 + 9115^2 .

It is a cyclic number.

It is not a de Polignac number, because 166002461 - 2² = 166002457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166002461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166002401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2243240 + ... + 2243313.

It is an arithmetic number, because the mean of its divisors is an integer number (42622263).

Almost surely, 2^166002461 is an apocalyptic number.

It is an amenable number.

166002461 is a deficient number, since it is larger than the sum of its proper divisors (4486591).

166002461 is an equidigital number, since it uses as much as digits as its factorization.

166002461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486590.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 166002461 is about 12884.1942316933. The cubic root of 166002461 is about 549.5891819244.

The spelling of 166002461 in words is "one hundred sixty-six million, two thousand, four hundred sixty-one".