6651551832 has 16 divisors (see below), whose sum is σ = 16628879640. Its totient is φ = 2217183936.

The previous prime is 6651551789. The next prime is 6651551833. The reversal of 6651551832 is 2381551566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651551833) 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, 138573973 + ... + 138574020.

Almost surely, 2^6651551832 is an apocalyptic number.

It is an amenable number.

6651551832 is an abundant number, since it is smaller than the sum of its proper divisors (9977327808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6651551832 is a wasteful number, since it uses less digits than its factorization.

6651551832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277148002 (or 277147998 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The square root of 6651551832 is about 81557.0464889454. The cubic root of 6651551832 is about 1880.6486210697.

The spelling of 6651551832 in words is "six billion, six hundred fifty-one million, five hundred fifty-one thousand, eight hundred thirty-two".