665066160650 has 24 divisors (see below), whose sum is σ = 1237173425580. Its totient is φ = 265994127360.

The previous prime is 665066160643. The next prime is 665066160653. The reversal of 665066160650 is 56061660566.

It can be written as a sum of positive squares in 6 ways, for example, as 430245476761 + 234820683889 = 655931^2 + 484583^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665066160595 and 665066160604.

It is not an unprimeable number, because it can be changed into a prime (665066160653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390839 + ... + 1217738.

Almost surely, 2^665066160650 is an apocalyptic number.

665066160650 is a deficient number, since it is larger than the sum of its proper divisors (572107264930).

665066160650 is a wasteful number, since it uses less digits than its factorization.

665066160650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616858 (or 1616853 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 665066160650 in words is "six hundred sixty-five billion, sixty-six million, one hundred sixty thousand, six hundred fifty".