1665316701 has 12 divisors (see below), whose sum is σ = 2411018428. Its totient is φ = 1107644544.

The previous prime is 1665316699. The next prime is 1665316717. The reversal of 1665316701 is 1076135661.

1665316701 is a `hidden beast` number, since 1 + 66 + 531 + 67 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 607376025 + 1057940676 = 24645^2 + 32526^2 .

It is not a de Polignac number, because 1665316701 - 2¹ = 1665316699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665316781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209770 + ... + 217563.

Almost surely, 2^1665316701 is an apocalyptic number.

It is an amenable number.

1665316701 is a deficient number, since it is larger than the sum of its proper divisors (745701727).

1665316701 is a wasteful number, since it uses less digits than its factorization.

1665316701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427772 (or 427769 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1665316701 is about 40808.2920617857. The cubic root of 1665316701 is about 1185.3109027736.

The spelling of 1665316701 in words is "one billion, six hundred sixty-five million, three hundred sixteen thousand, seven hundred one".