665005544 has 16 divisors (see below), whose sum is σ = 1425012000. Its totient is φ = 285002352.

The previous prime is 665005531. The next prime is 665005553. The reversal of 665005544 is 445500566.

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, 5937494 + ... + 5937605.

It is an arithmetic number, because the mean of its divisors is an integer number (89063250).

Almost surely, 2^665005544 is an apocalyptic number.

It is an amenable number.

665005544 is an abundant number, since it is smaller than the sum of its proper divisors (760006456).

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

665005544 is a wasteful number, since it uses less digits than its factorization.

665005544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11875112 (or 11875108 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 665005544 is about 25787.7014097806. The cubic root of 665005544 is about 872.8542991213.

The spelling of 665005544 in words is "six hundred sixty-five million, five thousand, five hundred forty-four".