6540665045 has 8 divisors (see below), whose sum is σ = 8101985280. Its totient is φ = 5063740560.

The previous prime is 6540665029. The next prime is 6540665057. The reversal of 6540665045 is 5405660456.

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

It is not a de Polignac number, because 6540665045 - 2⁴ = 6540665029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6540664993 and 6540665011.

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, 21098765 + ... + 21099074.

It is an arithmetic number, because the mean of its divisors is an integer number (1012748160).

Almost surely, 2^6540665045 is an apocalyptic number.

It is an amenable number.

6540665045 is a deficient number, since it is larger than the sum of its proper divisors (1561320235).

6540665045 is a wasteful number, since it uses less digits than its factorization.

6540665045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42197875.

The product of its (nonzero) digits is 432000, while the sum is 41.

The square root of 6540665045 is about 80874.3781738073. The cubic root of 6540665045 is about 1870.1393554340.

The spelling of 6540665045 in words is "six billion, five hundred forty million, six hundred sixty-five thousand, forty-five".