2668569840 has 80 divisors (see below), whose sum is σ = 9191748000. Its totient is φ = 711618048.

The previous prime is 2668569797. The next prime is 2668569851. The reversal of 2668569840 is 489658662.

It is a happy number.

2668569840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615565 + ... + 619884.

It is an arithmetic number, because the mean of its divisors is an integer number (114896850).

Almost surely, 2^2668569840 is an apocalyptic number.

2668569840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2668569840 is an abundant number, since it is smaller than the sum of its proper divisors (6523178160).

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

2668569840 is a wasteful number, since it uses less digits than its factorization.

2668569840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235471 (or 1235459 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The square root of 2668569840 is about 51658.2020593052. The cubic root of 2668569840 is about 1387.0523669230.

The spelling of 2668569840 in words is "two billion, six hundred sixty-eight million, five hundred sixty-nine thousand, eight hundred forty".