2086659990 has 96 divisors (see below), whose sum is σ = 5745841920. Its totient is φ = 523927872.

The previous prime is 2086659989. The next prime is 2086660007. The reversal of 2086659990 is 999566802.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 281917 + ... + 289223.

It is an arithmetic number, because the mean of its divisors is an integer number (59852520).

Almost surely, 2^2086659990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2086659990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2872920960).

2086659990 is an abundant number, since it is smaller than the sum of its proper divisors (3659181930).

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

2086659990 is a wasteful number, since it uses less digits than its factorization.

2086659990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7506 (or 7503 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 2086659990 is about 45679.9736208330. The cubic root of 2086659990 is about 1277.8618253782.

The spelling of 2086659990 in words is "two billion, eighty-six million, six hundred fifty-nine thousand, nine hundred ninety".