665023321610 has 16 divisors (see below), whose sum is σ = 1208229289056. Its totient is φ = 263523259728.

The previous prime is 665023321561. The next prime is 665023321631. The reversal of 665023321610 is 16123320566.

665023321610 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310757492 + ... + 310759631.

It is an arithmetic number, because the mean of its divisors is an integer number (75514330566).

Almost surely, 2^665023321610 is an apocalyptic number.

665023321610 is a deficient number, since it is larger than the sum of its proper divisors (543205967446).

665023321610 is a wasteful number, since it uses less digits than its factorization.

665023321610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621517237.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 665023321610 in words is "six hundred sixty-five billion, twenty-three million, three hundred twenty-one thousand, six hundred ten".