166225646 has 8 divisors (see below), whose sum is σ = 260179344. Its totient is φ = 79499200.

The previous prime is 166225537. The next prime is 166225667. The reversal of 166225646 is 646522661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806755 + ... + 1806846.

It is an arithmetic number, because the mean of its divisors is an integer number (32522418).

Almost surely, 2^166225646 is an apocalyptic number.

166225646 is a deficient number, since it is larger than the sum of its proper divisors (93953698).

166225646 is a wasteful number, since it uses less digits than its factorization.

166225646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613626.

The product of its digits is 103680, while the sum is 38.

The square root of 166225646 is about 12892.8525160261. The cubic root of 166225646 is about 549.8353733182.

The spelling of 166225646 in words is "one hundred sixty-six million, two hundred twenty-five thousand, six hundred forty-six".