6651551516 has 24 divisors (see below), whose sum is σ = 12375496224. Its totient is φ = 3121152320.

The previous prime is 6651551471. The next prime is 6651551519. The reversal of 6651551516 is 6151551566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651551519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677195 + ... + 686946.

It is an arithmetic number, because the mean of its divisors is an integer number (515645676).

Almost surely, 2^6651551516 is an apocalyptic number.

It is an amenable number.

6651551516 is a deficient number, since it is larger than the sum of its proper divisors (5723944708).

6651551516 is a wasteful number, since it uses less digits than its factorization.

6651551516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364221 (or 1364219 counting only the distinct ones).

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

The square root of 6651551516 is about 81557.0445516511. The cubic root of 6651551516 is about 1880.6485912880.

The spelling of 6651551516 in words is "six billion, six hundred fifty-one million, five hundred fifty-one thousand, five hundred sixteen".