6581994764 has 12 divisors (see below), whose sum is σ = 11519526984. Its totient is φ = 3290701344.

The previous prime is 6581994761. The next prime is 6581994799. The reversal of 6581994764 is 4674991856.

It is not an unprimeable number, because it can be changed into a prime (6581994761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19529 + ... + 116384.

It is an arithmetic number, because the mean of its divisors is an integer number (959960582).

Almost surely, 2^6581994764 is an apocalyptic number.

It is an amenable number.

6581994764 is a deficient number, since it is larger than the sum of its proper divisors (4937532220).

6581994764 is a wasteful number, since it uses less digits than its factorization.

6581994764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148024 (or 148022 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The square root of 6581994764 is about 81129.4937984948. The cubic root of 6581994764 is about 1874.0701536093.

The spelling of 6581994764 in words is "six billion, five hundred eighty-one million, nine hundred ninety-four thousand, seven hundred sixty-four".