2660043440 has 20 divisors (see below), whose sum is σ = 6184601184. Its totient is φ = 1064017344.

The previous prime is 2660043437. The next prime is 2660043457. The reversal of 2660043440 is 443400662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2660043440² = 14151662205374067200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16625192 + ... + 16625351.

Almost surely, 2^2660043440 is an apocalyptic number.

2660043440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660043440 is an abundant number, since it is smaller than the sum of its proper divisors (3524557744).

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

2660043440 is a wasteful number, since it uses less digits than its factorization.

2660043440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33250556 (or 33250550 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 2660043440 is about 51575.6089639279. The cubic root of 2660043440 is about 1385.5735246743.

The spelling of 2660043440 in words is "two billion, six hundred sixty million, forty-three thousand, four hundred forty".