6501960778 has 16 divisors (see below), whose sum is σ = 10271340000. Its totient is φ = 3078350352.

The previous prime is 6501960767. The next prime is 6501960809. The reversal of 6501960778 is 8770691056.

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, 37273 + ... + 119971.

It is an arithmetic number, because the mean of its divisors is an integer number (641958750).

Almost surely, 2^6501960778 is an apocalyptic number.

6501960778 is a deficient number, since it is larger than the sum of its proper divisors (3769379222).

6501960778 is a wasteful number, since it uses less digits than its factorization.

6501960778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84789.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 6501960778 is about 80634.7367950067. The cubic root of 6501960778 is about 1866.4432166132.

The spelling of 6501960778 in words is "six billion, five hundred one million, nine hundred sixty thousand, seven hundred seventy-eight".