2166643077 has 8 divisors (see below), whose sum is σ = 2966934816. Its totient is φ = 1405390032.

The previous prime is 2166643069. The next prime is 2166643123. The reversal of 2166643077 is 7703466612.

It is a happy number.

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

It is not a de Polignac number, because 2166643077 - 2³ = 2166643069 is a prime.

It is a super-2 number, since 2×2166643077² = 9388684446224055858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166643067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9759543 + ... + 9759764.

It is an arithmetic number, because the mean of its divisors is an integer number (370866852).

Almost surely, 2^2166643077 is an apocalyptic number.

It is an amenable number.

2166643077 is a deficient number, since it is larger than the sum of its proper divisors (800291739).

2166643077 is a wasteful number, since it uses less digits than its factorization.

2166643077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19519347.

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 2166643077 is about 46547.2134182058. The cubic root of 2166643077 is about 1293.9846499727.

The spelling of 2166643077 in words is "two billion, one hundred sixty-six million, six hundred forty-three thousand, seventy-seven".