16665682407 has 8 divisors (see below), whose sum is σ = 24240992640. Its totient is φ = 10100413560.

The previous prime is 16665682399. The next prime is 16665682417. The reversal of 16665682407 is 70428656661.

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

It is not a de Polignac number, because 16665682407 - 2³ = 16665682399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16665682407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665682417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252510307 + ... + 252510372.

It is an arithmetic number, because the mean of its divisors is an integer number (3030124080).

Almost surely, 2^16665682407 is an apocalyptic number.

16665682407 is a deficient number, since it is larger than the sum of its proper divisors (7575310233).

16665682407 is a wasteful number, since it uses less digits than its factorization.

16665682407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505020693.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 16665682407 in words is "sixteen billion, six hundred sixty-five million, six hundred eighty-two thousand, four hundred seven".