6651274544 has 40 divisors (see below), whose sum is σ = 13008125760. Its totient is φ = 3294446400.

The previous prime is 6651274459. The next prime is 6651274547. The reversal of 6651274544 is 4454721566.

It is a junction number, because it is equal to n+sod(n) for n = 6651274495 and 6651274504.

It is not an unprimeable number, because it can be changed into a prime (6651274547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088939 + ... + 1095029.

It is an arithmetic number, because the mean of its divisors is an integer number (325203144).

Almost surely, 2^6651274544 is an apocalyptic number.

It is an amenable number.

6651274544 is a deficient number, since it is larger than the sum of its proper divisors (6356851216).

6651274544 is a wasteful number, since it uses less digits than its factorization.

6651274544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6729 (or 6723 counting only the distinct ones).

The product of its digits is 806400, while the sum is 44.

The square root of 6651274544 is about 81555.3465077551. The cubic root of 6651274544 is about 1880.6224873917.

The spelling of 6651274544 in words is "six billion, six hundred fifty-one million, two hundred seventy-four thousand, five hundred forty-four".