665525226 has 8 divisors (see below), whose sum is σ = 1331050464. Its totient is φ = 221841740.

The previous prime is 665525213. The next prime is 665525239. The reversal of 665525226 is 622525566.

It is an interprime number because it is at equal distance from previous prime (665525213) and next prime (665525239).

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

665525226 is an admirable 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, 55460430 + ... + 55460441.

It is an arithmetic number, because the mean of its divisors is an integer number (166381308).

Almost surely, 2^665525226 is an apocalyptic number.

665525226 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.

665525226 is a wasteful number, since it uses less digits than its factorization.

665525226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110920876.

The product of its digits is 216000, while the sum is 39.

The square root of 665525226 is about 25797.7756017840. The cubic root of 665525226 is about 873.0816097872.

The spelling of 665525226 in words is "six hundred sixty-five million, five hundred twenty-five thousand, two hundred twenty-six".