6669551 has 8 divisors (see below), whose sum is σ = 8023680. Its totient is φ = 5415768.

The previous prime is 6669547. The next prime is 6669587. The reversal of 6669551 is 1559666.

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

It is a cyclic number.

It is not a de Polignac number, because 6669551 - 2² = 6669547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24941 + ... + 25206.

It is an arithmetic number, because the mean of its divisors is an integer number (1002960).

Almost surely, 2^6669551 is an apocalyptic number.

6669551 is a deficient number, since it is larger than the sum of its proper divisors (1354129).

6669551 is a wasteful number, since it uses less digits than its factorization.

6669551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50173.

The product of its digits is 48600, while the sum is 38.

The square root of 6669551 is about 2582.5473858189. The cubic root of 6669551 is about 188.2343444786.

The spelling of 6669551 in words is "six million, six hundred sixty-nine thousand, five hundred fifty-one".