166425772 has 6 divisors (see below), whose sum is σ = 291245108. Its totient is φ = 83212884.

The previous prime is 166425757. The next prime is 166425773. The reversal of 166425772 is 277524661.

It is not an unprimeable number, because it can be changed into a prime (166425773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20803218 + ... + 20803225.

Almost surely, 2^166425772 is an apocalyptic number.

It is an amenable number.

166425772 is a deficient number, since it is larger than the sum of its proper divisors (124819336).

166425772 is a wasteful number, since it uses less digits than its factorization.

166425772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41606447 (or 41606445 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 166425772 is about 12900.6113033453. The cubic root of 166425772 is about 550.0559414174.

The spelling of 166425772 in words is "one hundred sixty-six million, four hundred twenty-five thousand, seven hundred seventy-two".