6645134654 has 16 divisors (see below), whose sum is σ = 10410539040. Its totient is φ = 3175217760.

The previous prime is 6645134653. The next prime is 6645134681. The reversal of 6645134654 is 4564315466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645134653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14117 + ... + 116144.

It is an arithmetic number, because the mean of its divisors is an integer number (650658690).

Almost surely, 2^6645134654 is an apocalyptic number.

6645134654 is a deficient number, since it is larger than the sum of its proper divisors (3765404386).

6645134654 is a wasteful number, since it uses less digits than its factorization.

6645134654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131395.

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

The square root of 6645134654 is about 81517.6953427905. The cubic root of 6645134654 is about 1880.0436324188.

The spelling of 6645134654 in words is "six billion, six hundred forty-five million, one hundred thirty-four thousand, six hundred fifty-four".