166240461 has 4 divisors (see below), whose sum is σ = 221653952. Its totient is φ = 110826972.

The previous prime is 166240439. The next prime is 166240469. The reversal of 166240461 is 164042661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 164042661 = 3 ⋅54680887.

It is not a de Polignac number, because 166240461 - 2⁵ = 166240429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166240469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27706741 + ... + 27706746.

It is an arithmetic number, because the mean of its divisors is an integer number (55413488).

Almost surely, 2^166240461 is an apocalyptic number.

It is an amenable number.

166240461 is a deficient number, since it is larger than the sum of its proper divisors (55413491).

166240461 is an equidigital number, since it uses as much as digits as its factorization.

166240461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55413490.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 166240461 is about 12893.4270463675. The cubic root of 166240461 is about 549.8517076791.

The spelling of 166240461 in words is "one hundred sixty-six million, two hundred forty thousand, four hundred sixty-one".