2166667633 has 8 divisors (see below), whose sum is σ = 2413794600. Its totient is φ = 1931035008.

The previous prime is 2166667631. The next prime is 2166667639. The reversal of 2166667633 is 3367666612.

It can be written as a sum of positive squares in 4 ways, for example, as 3301489 + 2163366144 = 1817^2 + 46512^2 .

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 2166667633 - 2¹ = 2166667631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166667631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2873188 + ... + 2873941.

It is an arithmetic number, because the mean of its divisors is an integer number (301724325).

Almost surely, 2^2166667633 is an apocalyptic number.

It is an amenable number.

2166667633 is a deficient number, since it is larger than the sum of its proper divisors (247126967).

2166667633 is a wasteful number, since it uses less digits than its factorization.

2166667633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747171.

The product of its digits is 979776, while the sum is 46.

The square root of 2166667633 is about 46547.4771926471. The cubic root of 2166667633 is about 1293.9895384824.

The spelling of 2166667633 in words is "two billion, one hundred sixty-six million, six hundred sixty-seven thousand, six hundred thirty-three".