665674066 has 32 divisors (see below), whose sum is σ = 1093616640. Its totient is φ = 302654976.

The previous prime is 665674003. The next prime is 665674069. The reversal of 665674066 is 660476566.

665674066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (665674069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123606 + ... + 128878.

It is an arithmetic number, because the mean of its divisors is an integer number (34175520).

Almost surely, 2^665674066 is an apocalyptic number.

665674066 is a deficient number, since it is larger than the sum of its proper divisors (427942574).

665674066 is a wasteful number, since it uses less digits than its factorization.

665674066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5418.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The square root of 665674066 is about 25800.6601853518. The cubic root of 665674066 is about 873.1466911072.

The spelling of 665674066 in words is "six hundred sixty-five million, six hundred seventy-four thousand, sixty-six".