6621366 has 8 divisors (see below), whose sum is σ = 13242744. Its totient is φ = 2207120.

The previous prime is 6621361. The next prime is 6621371. The reversal of 6621366 is 6631266.

It is an interprime number because it is at equal distance from previous prime (6621361) and next prime (6621371).

It is a sphenic number, since it is the product of 3 distinct primes.

6621366 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551775 + ... + 551786.

It is an arithmetic number, because the mean of its divisors is an integer number (1655343).

Almost surely, 2^6621366 is an apocalyptic number.

6621366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6621366 is a wasteful number, since it uses less digits than its factorization.

6621366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103566.

The product of its digits is 7776, while the sum is 30.

The square root of 6621366 is about 2573.2015078497. The cubic root of 6621366 is about 187.7799409461.

The spelling of 6621366 in words is "six million, six hundred twenty-one thousand, three hundred sixty-six".