6611506551 has 64 divisors (see below), whose sum is σ = 11139340800. Its totient is φ = 3842028288.

The previous prime is 6611506541. The next prime is 6611506553. The reversal of 6611506551 is 1556051166.

It is not a de Polignac number, because 6611506551 - 2¹¹ = 6611504503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6611506553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2312715 + ... + 2315571.

It is an arithmetic number, because the mean of its divisors is an integer number (174052200).

Almost surely, 2^6611506551 is an apocalyptic number.

6611506551 is the 51426-th heptagonal number.

6611506551 is a deficient number, since it is larger than the sum of its proper divisors (4527834249).

6611506551 is a wasteful number, since it uses less digits than its factorization.

6611506551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245 (or 3239 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 6611506551 is about 81311.1711328769. The cubic root of 6611506551 is about 1876.8669098085.

The spelling of 6611506551 in words is "six billion, six hundred eleven million, five hundred six thousand, five hundred fifty-one".