6651515550 has 24 divisors (see below), whose sum is σ = 16495758936. Its totient is φ = 1773737440.

The previous prime is 6651515539. The next prime is 6651515561. The reversal of 6651515550 is 555151566.

It is an interprime number because it is at equal distance from previous prime (6651515539) and next prime (6651515561).

It is a super-2 number, since 2×6651515550² = 88485318223783605000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6651515499 and 6651515508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22171569 + ... + 22171868.

It is an arithmetic number, because the mean of its divisors is an integer number (687323289).

Almost surely, 2^6651515550 is an apocalyptic number.

6651515550 is an abundant number, since it is smaller than the sum of its proper divisors (9844243386).

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

6651515550 is a wasteful number, since it uses less digits than its factorization.

6651515550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44343452 (or 44343447 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 39.

The square root of 6651515550 is about 81556.8240553787. The cubic root of 6651515550 is about 1880.6452016262.

The spelling of 6651515550 in words is "six billion, six hundred fifty-one million, five hundred fifteen thousand, five hundred fifty".