6647477307572 has 48 divisors (see below), whose sum is σ = 12591057467520. Its totient is φ = 3059269804032.

The previous prime is 6647477307571. The next prime is 6647477307593. The reversal of 6647477307572 is 2757037747466.

It is a junction number, because it is equal to n+sod(n) for n = 6647477307499 and 6647477307508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647477307571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3518168 + ... + 5066799.

It is an arithmetic number, because the mean of its divisors is an integer number (262313697240).

Almost surely, 2^{6647477307572} is an apocalyptic number.

It is an amenable number.

6647477307572 is a deficient number, since it is larger than the sum of its proper divisors (5943580159948).

6647477307572 is a wasteful number, since it uses less digits than its factorization.

6647477307572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8585240 (or 8585238 counting only the distinct ones).

The product of its (nonzero) digits is 290424960, while the sum is 65.

The spelling of 6647477307572 in words is "six trillion, six hundred forty-seven billion, four hundred seventy-seven million, three hundred seven thousand, five hundred seventy-two".