6669400 has 24 divisors (see below), whose sum is σ = 15506820. Its totient is φ = 2667680.

The previous prime is 6669367. The next prime is 6669401. The reversal of 6669400 is 49666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16474 + ... + 16873.

Almost surely, 2^6669400 is an apocalyptic number.

It is an amenable number.

6669400 is an abundant number, since it is smaller than the sum of its proper divisors (8837420).

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

6669400 is a wasteful number, since it uses less digits than its factorization.

6669400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33363 (or 33354 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 6669400 is about 2582.5181509527. The cubic root of 6669400 is about 188.2329239132.

The spelling of 6669400 in words is "six million, six hundred sixty-nine thousand, four hundred".