665425158 has 8 divisors (see below), whose sum is σ = 1330850328. Its totient is φ = 221808384.

The previous prime is 665425157. The next prime is 665425181. The reversal of 665425158 is 851524566.

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

665425158 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665425151) 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, 55452091 + ... + 55452102.

It is an arithmetic number, because the mean of its divisors is an integer number (166356291).

Almost surely, 2^665425158 is an apocalyptic number.

665425158 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665425158 is a wasteful number, since it uses less digits than its factorization.

665425158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110904198.

The product of its digits is 288000, while the sum is 42.

The square root of 665425158 is about 25795.8360593333. The cubic root of 665425158 is about 873.0378489066.

The spelling of 665425158 in words is "six hundred sixty-five million, four hundred twenty-five thousand, one hundred fifty-eight".