2166887508 has 24 divisors (see below), whose sum is σ = 5075302848. Its totient is φ = 719548416.

The previous prime is 2166887501. The next prime is 2166887521. The reversal of 2166887508 is 8057886612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166887501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340141 + ... + 346452.

It is an arithmetic number, because the mean of its divisors is an integer number (211470952).

Almost surely, 2^2166887508 is an apocalyptic number.

It is an amenable number.

2166887508 is an abundant number, since it is smaller than the sum of its proper divisors (2908415340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166887508 is a wasteful number, since it uses less digits than its factorization.

2166887508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686863 (or 686861 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The square root of 2166887508 is about 46549.8389685722. The cubic root of 2166887508 is about 1294.0333086669.

The spelling of 2166887508 in words is "two billion, one hundred sixty-six million, eight hundred eighty-seven thousand, five hundred eight".