16721466767 has 2 divisors, whose sum is σ = 16721466768. Its totient is φ = 16721466766.

The previous prime is 16721466763. The next prime is 16721466779. The reversal of 16721466767 is 76766412761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16721466767 - 2² = 16721466763 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16721466763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360733383 + 8360733384.

It is an arithmetic number, because the mean of its divisors is an integer number (8360733384).

Almost surely, 2^16721466767 is an apocalyptic number.

16721466767 is a deficient number, since it is larger than the sum of its proper divisors (1).

16721466767 is an equidigital number, since it uses as much as digits as its factorization.

16721466767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 53.

The spelling of 16721466767 in words is "sixteen billion, seven hundred twenty-one million, four hundred sixty-six thousand, seven hundred sixty-seven".