2689023666 has 96 divisors (see below), whose sum is σ = 6521256000. Its totient is φ = 736138368.

The previous prime is 2689023653. The next prime is 2689023691. The reversal of 2689023666 is 6663209862.

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, 1183980 + ... + 1186248.

It is an arithmetic number, because the mean of its divisors is an integer number (67929750).

Almost surely, 2^2689023666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2689023666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3260628000).

2689023666 is an abundant number, since it is smaller than the sum of its proper divisors (3832232334).

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

2689023666 is a wasteful number, since it uses less digits than its factorization.

2689023666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456 (or 2449 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The square root of 2689023666 is about 51855.7968408547. The cubic root of 2689023666 is about 1390.5871380482.

The spelling of 2689023666 in words is "two billion, six hundred eighty-nine million, twenty-three thousand, six hundred sixty-six".