166425081 has 8 divisors (see below), whose sum is σ = 229058304. Its totient is φ = 107370960.

The previous prime is 166425059. The next prime is 166425101. The reversal of 166425081 is 180524661.

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

It is not a de Polignac number, because 166425081 - 2⁷ = 166424953 is a prime.

It is a super-2 number, since 2×166425081² = 55394615171713122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166425011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 894666 + ... + 894851.

It is an arithmetic number, because the mean of its divisors is an integer number (28632288).

Almost surely, 2^166425081 is an apocalyptic number.

It is an amenable number.

166425081 is a deficient number, since it is larger than the sum of its proper divisors (62633223).

166425081 is a wasteful number, since it uses less digits than its factorization.

166425081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789551.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 166425081 is about 12900.5845216409. The cubic root of 166425081 is about 550.0551801387.

The spelling of 166425081 in words is "one hundred sixty-six million, four hundred twenty-five thousand, eighty-one".