6620386 has 4 divisors (see below), whose sum is σ = 9930582. Its totient is φ = 3310192.

The previous prime is 6620371. The next prime is 6620387. The reversal of 6620386 is 6830266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4076361 + 2544025 = 2019^2 + 1595^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655095 + ... + 1655098.

Almost surely, 2^6620386 is an apocalyptic number.

6620386 is a deficient number, since it is larger than the sum of its proper divisors (3310196).

6620386 is a wasteful number, since it uses less digits than its factorization.

6620386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310195.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 6620386 is about 2573.0110765405. The cubic root of 6620386 is about 187.7706763210.

The spelling of 6620386 in words is "six million, six hundred twenty thousand, three hundred eighty-six".