6666743400 has 96 divisors (see below), whose sum is σ = 20680000800. Its totient is φ = 1776672000.

The previous prime is 6666743393. The next prime is 6666743417. The reversal of 6666743400 is 43476666.

It is a super-2 number, since 2×6666743400² = 88890935122887120000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1431075 + ... + 1435725.

It is an arithmetic number, because the mean of its divisors is an integer number (215416675).

Almost surely, 2^6666743400 is an apocalyptic number.

6666743400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6666743400 is an abundant number, since it is smaller than the sum of its proper divisors (14013257400).

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

6666743400 is a wasteful number, since it uses less digits than its factorization.

6666743400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059 (or 7050 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 42.

The square root of 6666743400 is about 81650.1279852028. The cubic root of 6666743400 is about 1882.0792786175.

The spelling of 6666743400 in words is "six billion, six hundred sixty-six million, seven hundred forty-three thousand, four hundred".