2666810898 has 64 divisors (see below), whose sum is σ = 6136381440. Its totient is φ = 857595600.

The previous prime is 2666810891. The next prime is 2666810941. The reversal of 2666810898 is 8980186662.

It is a happy number.

2666810898 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2666810898² = 14223760731383132808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2666810891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 578583 + ... + 583173.

It is an arithmetic number, because the mean of its divisors is an integer number (95880960).

Almost surely, 2^2666810898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666810898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3068190720).

2666810898 is an abundant number, since it is smaller than the sum of its proper divisors (3469570542).

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

2666810898 is a wasteful number, since it uses less digits than its factorization.

2666810898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980 (or 4974 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 2666810898 is about 51641.1744444295. The cubic root of 2666810898 is about 1386.7475493558.

The spelling of 2666810898 in words is "two billion, six hundred sixty-six million, eight hundred ten thousand, eight hundred ninety-eight".