665130426 has 32 divisors (see below), whose sum is σ = 1378798080. Its totient is φ = 213731136.

The previous prime is 665130409. The next prime is 665130437. The reversal of 665130426 is 624031566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10455 + ... + 37941.

It is an arithmetic number, because the mean of its divisors is an integer number (43087440).

Almost surely, 2^665130426 is an apocalyptic number.

665130426 is an abundant number, since it is smaller than the sum of its proper divisors (713667654).

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

665130426 is a wasteful number, since it uses less digits than its factorization.

665130426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27638.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 665130426 is about 25790.1226441442. The cubic root of 665130426 is about 872.9089337375.

The spelling of 665130426 in words is "six hundred sixty-five million, one hundred thirty thousand, four hundred twenty-six".