2666405400 has 96 divisors (see below), whose sum is σ = 8301767760. Its totient is φ = 707952640.

The previous prime is 2666405389. The next prime is 2666405419. The reversal of 2666405400 is 45046662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130264 + ... + 149336.

Almost surely, 2^2666405400 is an apocalyptic number.

2666405400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666405400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4150883880).

2666405400 is an abundant number, since it is smaller than the sum of its proper divisors (5635362360).

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

2666405400 is a wasteful number, since it uses less digits than its factorization.

2666405400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19325 (or 19316 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 2666405400 is about 51637.2481838450. The cubic root of 2666405400 is about 1386.6772591749.

The spelling of 2666405400 in words is "two billion, six hundred sixty-six million, four hundred five thousand, four hundred".