6540462665 has 16 divisors (see below), whose sum is σ = 8665223616. Its totient is φ = 4699387200.

The previous prime is 6540462631. The next prime is 6540462673. The reversal of 6540462665 is 5662640456.

It is a happy number.

It is not a de Polignac number, because 6540462665 - 2⁶ = 6540462601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711806 + ... + 720935.

It is an arithmetic number, because the mean of its divisors is an integer number (541576476).

Almost surely, 2^6540462665 is an apocalyptic number.

It is an amenable number.

6540462665 is a deficient number, since it is larger than the sum of its proper divisors (2124760951).

6540462665 is a wasteful number, since it uses less digits than its factorization.

6540462665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432840.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 6540462665 is about 80873.1269644002. The cubic root of 6540462665 is about 1870.1200667376.

The spelling of 6540462665 in words is "six billion, five hundred forty million, four hundred sixty-two thousand, six hundred sixty-five".