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6740665 = 51348133
BaseRepresentation
bin11001101101101010111001
3110200110110021
4121231222321
53211200130
6400250441
7111203041
oct31555271
913613407
106740665
1138943a8
122310a21
131520179
14c76721
158d237a
hex66dab9

6740665 has 4 divisors (see below), whose sum is σ = 8088804. Its totient is φ = 5392528.

The previous prime is 6740659. The next prime is 6740707. The reversal of 6740665 is 5660476.

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 2062096 + 4678569 = 1436^2 + 2163^2 .

It is a cyclic number.

It is not a de Polignac number, because 6740665 - 219 = 6216377 is a prime.

It is a Duffinian number.

6740665 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6740665.

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, 674062 + ... + 674071.

It is an arithmetic number, because the mean of its divisors is an integer number (2022201).

Almost surely, 26740665 is an apocalyptic number.

It is an amenable number.

6740665 is a deficient number, since it is larger than the sum of its proper divisors (1348139).

6740665 is a wasteful number, since it uses less digits than its factorization.

6740665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348138.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 6740665 is about 2596.2790682051. The cubic root of 6740665 is about 188.9009960841.

The spelling of 6740665 in words is "six million, seven hundred forty thousand, six hundred sixty-five".

Divisors: 1 5 1348133 6740665