665325554 has 8 divisors (see below), whose sum is σ = 1041379200. Its totient is φ = 318199156.

The previous prime is 665325553. The next prime is 665325599. The reversal of 665325554 is 455523566.

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

It is not an unprimeable number, because it can be changed into a prime (665325553) 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, 7231754 + ... + 7231845.

It is an arithmetic number, because the mean of its divisors is an integer number (130172400).

Almost surely, 2^665325554 is an apocalyptic number.

665325554 is a deficient number, since it is larger than the sum of its proper divisors (376053646).

665325554 is a wasteful number, since it uses less digits than its factorization.

665325554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14463624.

The product of its digits is 540000, while the sum is 41.

The square root of 665325554 is about 25793.9053654153. The cubic root of 665325554 is about 872.9942865816.

The spelling of 665325554 in words is "six hundred sixty-five million, three hundred twenty-five thousand, five hundred fifty-four".