6654625551 has 40 divisors (see below), whose sum is σ = 11370999200. Its totient is φ = 3799291392.

The previous prime is 6654625501. The next prime is 6654625559. The reversal of 6654625551 is 1555264566.

6654625551 is a `hidden beast` number, since 6 + 6 + 546 + 2 + 55 + 51 = 666.

It is not a de Polignac number, because 6654625551 - 2¹⁰ = 6654624527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6654625497 and 6654625506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6654625559) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 730875 + ... + 739923.

It is an arithmetic number, because the mean of its divisors is an integer number (284274980).

Almost surely, 2^6654625551 is an apocalyptic number.

6654625551 is a deficient number, since it is larger than the sum of its proper divisors (4716373649).

6654625551 is a wasteful number, since it uses less digits than its factorization.

6654625551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365 (or 10356 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The square root of 6654625551 is about 81575.8882942748. Note that the first 3 decimals coincide. The cubic root of 6654625551 is about 1880.9382625128.

The spelling of 6654625551 in words is "six billion, six hundred fifty-four million, six hundred twenty-five thousand, five hundred fifty-one".