665422905956 has 6 divisors (see below), whose sum is σ = 1164490085430. Its totient is φ = 332711452976.

The previous prime is 665422905949. The next prime is 665422906003. The reversal of 665422905956 is 659509224566.

665422905956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 354103544356 + 311319361600 = 595066^2 + 557960^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665422905895 and 665422905904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83177863241 + ... + 83177863248.

It is an arithmetic number, because the mean of its divisors is an integer number (194081680905).

Almost surely, 2^665422905956 is an apocalyptic number.

It is an amenable number.

665422905956 is a deficient number, since it is larger than the sum of its proper divisors (499067179474).

665422905956 is a wasteful number, since it uses less digits than its factorization.

665422905956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166355726493 (or 166355726491 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 665422905956 in words is "six hundred sixty-five billion, four hundred twenty-two million, nine hundred five thousand, nine hundred fifty-six".