16642665007 has 2 divisors, whose sum is σ = 16642665008. Its totient is φ = 16642665006.

The previous prime is 16642664999. The next prime is 16642665031. The reversal of 16642665007 is 70056624661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16642665007 - 2³ = 16642664999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16642665047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321332503 + 8321332504.

It is an arithmetic number, because the mean of its divisors is an integer number (8321332504).

Almost surely, 2^16642665007 is an apocalyptic number.

16642665007 is a deficient number, since it is larger than the sum of its proper divisors (1).

16642665007 is an equidigital number, since it uses as much as digits as its factorization.

16642665007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 16642665007 in words is "sixteen billion, six hundred forty-two million, six hundred sixty-five thousand, seven".