6542665 has 8 divisors (see below), whose sum is σ = 8034048. Its totient is φ = 5112240.

The previous prime is 6542647. The next prime is 6542681. The reversal of 6542665 is 5662456.

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

It is not a de Polignac number, because 6542665 - 2⁵ = 6542633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6542665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15001 + ... + 15430.

It is an arithmetic number, because the mean of its divisors is an integer number (1004256).

Almost surely, 2^6542665 is an apocalyptic number.

It is an amenable number.

6542665 is a deficient number, since it is larger than the sum of its proper divisors (1491383).

6542665 is a wasteful number, since it uses less digits than its factorization.

6542665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30479.

The product of its digits is 43200, while the sum is 34.

The square root of 6542665 is about 2557.8633661711. The cubic root of 6542665 is about 187.0329948357.

The spelling of 6542665 in words is "six million, five hundred forty-two thousand, six hundred sixty-five".