16507076661 has 12 divisors (see below), whose sum is σ = 23846278092. Its totient is φ = 11003461056.

The previous prime is 16507076639. The next prime is 16507076669. The reversal of 16507076661 is 16667070561.

16507076661 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 2 ways, for example, as 7563780900 + 8943295761 = 86970^2 + 94569^2 .

It is not a de Polignac number, because 16507076661 - 2⁷ = 16507076533 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16507076669) 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, 17736 + ... + 182561.

It is an arithmetic number, because the mean of its divisors is an integer number (1987189841).

Almost surely, 2^16507076661 is an apocalyptic number.

It is an amenable number.

16507076661 is a deficient number, since it is larger than the sum of its proper divisors (7339201431).

16507076661 is a wasteful number, since it uses less digits than its factorization.

16507076661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209460 (or 209457 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 16507076661 in words is "sixteen billion, five hundred seven million, seventy-six thousand, six hundred sixty-one".