16661245322767 has 8 divisors (see below), whose sum is σ = 16680933405056. Its totient is φ = 16641560146392.

The previous prime is 16661245322753. The next prime is 16661245322783. The reversal of 16661245322767 is 76722354216661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16661245322767 - 2¹⁹ = 16661244798479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661245322747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10856398 + ... + 12295684.

It is an arithmetic number, because the mean of its divisors is an integer number (2085116675632).

Almost surely, 2^{16661245322767} is an apocalyptic number.

16661245322767 is a deficient number, since it is larger than the sum of its proper divisors (19688082289).

16661245322767 is a wasteful number, since it uses less digits than its factorization.

16661245322767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452957.

The product of its digits is 30481920, while the sum is 58.

The spelling of 16661245322767 in words is "sixteen trillion, six hundred sixty-one billion, two hundred forty-five million, three hundred twenty-two thousand, seven hundred sixty-seven".