2660819540 has 24 divisors (see below), whose sum is σ = 5658455040. Its totient is φ = 1050854688.

The previous prime is 2660819537. The next prime is 2660819543. The reversal of 2660819540 is 459180662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2660819537) and next prime (2660819543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660819543) 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, 840452 + ... + 843611.

It is an arithmetic number, because the mean of its divisors is an integer number (235768960).

Almost surely, 2^2660819540 is an apocalyptic number.

2660819540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660819540 is an abundant number, since it is smaller than the sum of its proper divisors (2997635500).

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

2660819540 is a wasteful number, since it uses less digits than its factorization.

2660819540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684151 (or 1684149 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 2660819540 is about 51583.1323205561. The cubic root of 2660819540 is about 1385.7082642092.

The spelling of 2660819540 in words is "two billion, six hundred sixty million, eight hundred nineteen thousand, five hundred forty".