6662785 has 4 divisors (see below), whose sum is σ = 7995348. Its totient is φ = 5330224.

The previous prime is 6662771. The next prime is 6662809. The reversal of 6662785 is 5872666.

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 5193841 + 1468944 = 2279^2 + 1212^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662785 - 2⁵ = 6662753 is a prime.

It is a Duffinian number.

6662785 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666274 + ... + 666283.

It is an arithmetic number, because the mean of its divisors is an integer number (1998837).

Almost surely, 2^6662785 is an apocalyptic number.

It is an amenable number.

6662785 is a deficient number, since it is larger than the sum of its proper divisors (1332563).

6662785 is a wasteful number, since it uses less digits than its factorization.

6662785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332562.

The product of its digits is 120960, while the sum is 40.

The square root of 6662785 is about 2581.2371065053. The cubic root of 6662785 is about 188.1706708026.

It can be divided in two parts, 66627 and 85, that multiplied together give a triangular number (5663295 = T₃₃₆₅).

The spelling of 6662785 in words is "six million, six hundred sixty-two thousand, seven hundred eighty-five".