166651228799 has 16 divisors (see below), whose sum is σ = 183247819776. Its totient is φ = 150297163200.

The previous prime is 166651228789. The next prime is 166651228817. The reversal of 166651228799 is 997822156661.

It is a cyclic number.

It is not a de Polignac number, because 166651228799 - 2⁸ = 166651228543 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 (166651228789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2326184 + ... + 2396754.

It is an arithmetic number, because the mean of its divisors is an integer number (11452988736).

Almost surely, 2^166651228799 is an apocalyptic number.

166651228799 is a deficient number, since it is larger than the sum of its proper divisors (16596590977).

166651228799 is a wasteful number, since it uses less digits than its factorization.

166651228799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72286.

The product of its digits is 19595520, while the sum is 62.

The spelling of 166651228799 in words is "one hundred sixty-six billion, six hundred fifty-one million, two hundred twenty-eight thousand, seven hundred ninety-nine".