6551861072 has 20 divisors (see below), whose sum is σ = 12700630560. Its totient is φ = 3274279008.

The previous prime is 6551861051. The next prime is 6551861077. The reversal of 6551861072 is 2701681556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551861077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70172 + ... + 134267.

It is an arithmetic number, because the mean of its divisors is an integer number (635031528).

Almost surely, 2^6551861072 is an apocalyptic number.

It is an amenable number.

6551861072 is a deficient number, since it is larger than the sum of its proper divisors (6148769488).

6551861072 is a wasteful number, since it uses less digits than its factorization.

6551861072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206450 (or 206444 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 6551861072 is about 80943.5672058009. The cubic root of 6551861072 is about 1871.2058216586.

The spelling of 6551861072 in words is "six billion, five hundred fifty-one million, eight hundred sixty-one thousand, seventy-two".