2166478088 has 8 divisors (see below), whose sum is σ = 4062146430. Its totient is φ = 1083239040.

The previous prime is 2166478063. The next prime is 2166478091. The reversal of 2166478088 is 8808746612.

It can be written as a sum of positive squares in only one way, i.e., 2154630724 + 11847364 = 46418^2 + 3442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135404873 + ... + 135404888.

Almost surely, 2^2166478088 is an apocalyptic number.

It is an amenable number.

2166478088 is a deficient number, since it is larger than the sum of its proper divisors (1895668342).

2166478088 is a wasteful number, since it uses less digits than its factorization.

2166478088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270809767 (or 270809763 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 2166478088 is about 46545.4411086628. The cubic root of 2166478088 is about 1293.9518036686.

The spelling of 2166478088 in words is "two billion, one hundred sixty-six million, four hundred seventy-eight thousand, eighty-eight".