665016506722 has 8 divisors (see below), whose sum is σ = 997603411500. Its totient is φ = 332482036224.

The previous prime is 665016506711. The next prime is 665016506729. The reversal of 665016506722 is 227605610566.

It can be written as a sum of positive squares in 2 ways, for example, as 484654061241 + 180362445481 = 696171^2 + 424691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (665016506729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13076847 + ... + 13127602.

Almost surely, 2^665016506722 is an apocalyptic number.

665016506722 is a deficient number, since it is larger than the sum of its proper divisors (332586904778).

665016506722 is a wasteful number, since it uses less digits than its factorization.

665016506722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26217140.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 665016506722 in words is "six hundred sixty-five billion, sixteen million, five hundred six thousand, seven hundred twenty-two".