16668347607 has 24 divisors (see below), whose sum is σ = 25411729200. Its totient is φ = 10499113728.

The previous prime is 16668347593. The next prime is 16668347651. The reversal of 16668347607 is 70674386661.

It is not a de Polignac number, because 16668347607 - 2¹⁸ = 16668085463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668347677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66882 + ... + 194447.

It is an arithmetic number, because the mean of its divisors is an integer number (1058822050).

Almost surely, 2^16668347607 is an apocalyptic number.

16668347607 is a deficient number, since it is larger than the sum of its proper divisors (8743381593).

16668347607 is a wasteful number, since it uses less digits than its factorization.

16668347607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261727 (or 261724 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 16668347607 in words is "sixteen billion, six hundred sixty-eight million, three hundred forty-seven thousand, six hundred seven".