16663004251 has 2 divisors, whose sum is σ = 16663004252. Its totient is φ = 16663004250.

The previous prime is 16663004249. The next prime is 16663004269. The reversal of 16663004251 is 15240036661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16663004251 - 2¹ = 16663004249 is a prime.

Together with 16663004249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16663004231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8331502125 + 8331502126.

It is an arithmetic number, because the mean of its divisors is an integer number (8331502126).

Almost surely, 2^16663004251 is an apocalyptic number.

16663004251 is a deficient number, since it is larger than the sum of its proper divisors (1).

16663004251 is an equidigital number, since it uses as much as digits as its factorization.

16663004251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 16663004251 in words is "sixteen billion, six hundred sixty-three million, four thousand, two hundred fifty-one".