6616745 has 4 divisors (see below), whose sum is σ = 7940100. Its totient is φ = 5293392.

The previous prime is 6616717. The next prime is 6616751. The reversal of 6616745 is 5476166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4648336 + 1968409 = 2156^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 6616745 - 2⁶ = 6616681 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661670 + ... + 661679.

It is an arithmetic number, because the mean of its divisors is an integer number (1985025).

Almost surely, 2^6616745 is an apocalyptic number.

It is an amenable number.

6616745 is a deficient number, since it is larger than the sum of its proper divisors (1323355).

6616745 is a wasteful number, since it uses less digits than its factorization.

6616745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323354.

The product of its digits is 30240, while the sum is 35.

The square root of 6616745 is about 2572.3034424422. The cubic root of 6616745 is about 187.7362473917.

The spelling of 6616745 in words is "six million, six hundred sixteen thousand, seven hundred forty-five".