6607921 has 8 divisors (see below), whose sum is σ = 6723360. Its totient is φ = 6493728.

The previous prime is 6607919. The next prime is 6607949. The reversal of 6607921 is 1297066.

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 6607921 - 2¹ = 6607919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6607961) 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, 18870 + ... + 19216.

It is an arithmetic number, because the mean of its divisors is an integer number (840420).

Almost surely, 2^6607921 is an apocalyptic number.

It is an amenable number.

6607921 is a deficient number, since it is larger than the sum of its proper divisors (115439).

6607921 is a wasteful number, since it uses less digits than its factorization.

6607921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 6607921 is about 2570.5876759994. The cubic root of 6607921 is about 187.6527561085.

The spelling of 6607921 in words is "six million, six hundred seven thousand, nine hundred twenty-one".