6621065 has 8 divisors (see below), whose sum is σ = 8667648. Its totient is φ = 4815280.

The previous prime is 6621061. The next prime is 6621071. The reversal of 6621065 is 5601266.

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

It is not a de Polignac number, because 6621065 - 2² = 6621061 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6621061) 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, 60137 + ... + 60246.

It is an arithmetic number, because the mean of its divisors is an integer number (1083456).

Almost surely, 2^6621065 is an apocalyptic number.

It is an amenable number.

6621065 is a deficient number, since it is larger than the sum of its proper divisors (2046583).

6621065 is a wasteful number, since it uses less digits than its factorization.

6621065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120399.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 6621065 is about 2573.1430197329. The cubic root of 6621065 is about 187.7770954800. Note that the first 3 decimals are identical.

The spelling of 6621065 in words is "six million, six hundred twenty-one thousand, sixty-five".