16681707 has 42 divisors (see below), whose sum is σ = 29156868. Its totient is φ = 9511992.

The previous prime is 16681703. The next prime is 16681723. The reversal of 16681707 is 70718661.

It is a happy number.

It is not a de Polignac number, because 16681707 - 2² = 16681703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16681703) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 35488 + ... + 35954.

Almost surely, 2^16681707 is an apocalyptic number.

16681707 is a deficient number, since it is larger than the sum of its proper divisors (12475161).

16681707 is an frugal number, since it uses more digits than its factorization.

16681707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 16681707 is about 4084.3245463601. The cubic root of 16681707 is about 255.5132913583.

It can be divided in two parts, 1668 and 1707, that added together give a cube (3375 = 15³).

The spelling of 16681707 in words is "sixteen million, six hundred eighty-one thousand, seven hundred seven".