6611551556 has 12 divisors (see below), whose sum is σ = 11605172880. Its totient is φ = 3295787880.

The previous prime is 6611551517. The next prime is 6611551561. The reversal of 6611551556 is 6551551166.

It is a super-2 number, since 2×6611551556² = 87425227955292042272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2495486 + ... + 2498133.

It is an arithmetic number, because the mean of its divisors is an integer number (967097740).

Almost surely, 2^6611551556 is an apocalyptic number.

It is an amenable number.

6611551556 is a deficient number, since it is larger than the sum of its proper divisors (4993621324).

6611551556 is a wasteful number, since it uses less digits than its factorization.

6611551556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4993954 (or 4993952 counting only the distinct ones).

The product of its digits is 135000, while the sum is 41.

The square root of 6611551556 is about 81311.4478778972. The cubic root of 6611551556 is about 1876.8711684548.

The spelling of 6611551556 in words is "six billion, six hundred eleven million, five hundred fifty-one thousand, five hundred fifty-six".