16642699 has 2 divisors, whose sum is σ = 16642700. Its totient is φ = 16642698.

The previous prime is 16642697. The next prime is 16642709. The reversal of 16642699 is 99624661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16642699 - 2¹ = 16642697 is a prime.

Together with 16642697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16642697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321349 + 8321350.

It is an arithmetic number, because the mean of its divisors is an integer number (8321350).

Almost surely, 2^16642699 is an apocalyptic number.

16642699 is a deficient number, since it is larger than the sum of its proper divisors (1).

16642699 is an equidigital number, since it uses as much as digits as its factorization.

16642699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 16642699 is about 4079.5464208659. The cubic root of 16642699 is about 255.3139743966.

The spelling of 16642699 in words is "sixteen million, six hundred forty-two thousand, six hundred ninety-nine".