16690667947 has 2 divisors, whose sum is σ = 16690667948. Its totient is φ = 16690667946.

The previous prime is 16690667923. The next prime is 16690667993. The reversal of 16690667947 is 74976609661.

It is a weak prime.

It is an emirp because it is prime and its reverse (74976609661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16690667947 - 2¹¹ = 16690665899 is a prime.

It is not a weakly prime, because it can be changed into another prime (16690617947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8345333973 + 8345333974.

It is an arithmetic number, because the mean of its divisors is an integer number (8345333974).

Almost surely, 2^16690667947 is an apocalyptic number.

16690667947 is a deficient number, since it is larger than the sum of its proper divisors (1).

16690667947 is an equidigital number, since it uses as much as digits as its factorization.

16690667947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 16690667947 in words is "sixteen billion, six hundred ninety million, six hundred sixty-seven thousand, nine hundred forty-seven".