6651515992 has 32 divisors (see below), whose sum is σ = 14044262400. Its totient is φ = 2925885600.

The previous prime is 6651515989. The next prime is 6651515993. The reversal of 6651515992 is 2995151566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651515993) 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, 1216392 + ... + 1221847.

It is an arithmetic number, because the mean of its divisors is an integer number (438883200).

Almost surely, 2^6651515992 is an apocalyptic number.

6651515992 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

6651515992 is an abundant number, since it is smaller than the sum of its proper divisors (7392746408).

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

6651515992 is a wasteful number, since it uses less digits than its factorization.

6651515992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438287 (or 2438283 counting only the distinct ones).

The product of its digits is 729000, while the sum is 49.

The square root of 6651515992 is about 81556.8267651458. The cubic root of 6651515992 is about 1880.6452432832.

The spelling of 6651515992 in words is "six billion, six hundred fifty-one million, five hundred fifteen thousand, nine hundred ninety-two".