6564747716 has 6 divisors (see below), whose sum is σ = 11488308510. Its totient is φ = 3282373856.

The previous prime is 6564747671. The next prime is 6564747733. The reversal of 6564747716 is 6177474656.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6295787716 + 268960000 = 79346^2 + 16400^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820593461 + ... + 820593468.

It is an arithmetic number, because the mean of its divisors is an integer number (1914718085).

Almost surely, 2^6564747716 is an apocalyptic number.

It is an amenable number.

6564747716 is a deficient number, since it is larger than the sum of its proper divisors (4923560794).

6564747716 is a wasteful number, since it uses less digits than its factorization.

6564747716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641186933 (or 1641186931 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 53.

The square root of 6564747716 is about 81023.1307467195. The cubic root of 6564747716 is about 1872.4318229868.

The spelling of 6564747716 in words is "six billion, five hundred sixty-four million, seven hundred forty-seven thousand, seven hundred sixteen".