665401794 has 32 divisors (see below), whose sum is σ = 1454547456. Its totient is φ = 202018560.

The previous prime is 665401783. The next prime is 665401801. The reversal of 665401794 is 497104566.

665401794 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 102057 + ... + 108380.

It is an arithmetic number, because the mean of its divisors is an integer number (45454608).

Almost surely, 2^665401794 is an apocalyptic number.

665401794 is an abundant number, since it is smaller than the sum of its proper divisors (789145662).

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

665401794 is a wasteful number, since it uses less digits than its factorization.

665401794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210490.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 665401794 is about 25795.3831915713. The cubic root of 665401794 is about 873.0276309306.

The spelling of 665401794 in words is "six hundred sixty-five million, four hundred one thousand, seven hundred ninety-four".