6506655278 has 16 divisors (see below), whose sum is σ = 10019856384. Its totient is φ = 3167428440.

The previous prime is 6506655263. The next prime is 6506655307. The reversal of 6506655278 is 8725566056.

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, 163250 + ... + 199157.

It is an arithmetic number, because the mean of its divisors is an integer number (626241024).

Almost surely, 2^6506655278 is an apocalyptic number.

6506655278 is a deficient number, since it is larger than the sum of its proper divisors (3513201106).

6506655278 is a wasteful number, since it uses less digits than its factorization.

6506655278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362647.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The square root of 6506655278 is about 80663.8412053381. The cubic root of 6506655278 is about 1866.8923072830.

The spelling of 6506655278 in words is "six billion, five hundred six million, six hundred fifty-five thousand, two hundred seventy-eight".