2166654667 has 4 divisors (see below), whose sum is σ = 2167189920. Its totient is φ = 2166119416.

The previous prime is 2166654661. The next prime is 2166654689. The reversal of 2166654667 is 7664566612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166654667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166654667.

It is not an unprimeable number, because it can be changed into a prime (2166654661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261508 + ... + 269665.

It is an arithmetic number, because the mean of its divisors is an integer number (541797480).

Almost surely, 2^2166654667 is an apocalyptic number.

2166654667 is a deficient number, since it is larger than the sum of its proper divisors (535253).

2166654667 is an equidigital number, since it uses as much as digits as its factorization.

2166654667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535252.

The product of its digits is 2177280, while the sum is 49.

The square root of 2166654667 is about 46547.3379152879. The cubic root of 2166654667 is about 1293.9869572679.

The spelling of 2166654667 in words is "two billion, one hundred sixty-six million, six hundred fifty-four thousand, six hundred sixty-seven".