6651125065 has 8 divisors (see below), whose sum is σ = 8595300168. Its totient is φ = 4911600000.

The previous prime is 6651125011. The next prime is 6651125077. The reversal of 6651125065 is 5605211566.

It can be written as a sum of positive squares in 4 ways, for example, as 534164544 + 6116960521 = 23112^2 + 78211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6651125065 - 2⁷ = 6651124937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51162436 + ... + 51162565.

It is an arithmetic number, because the mean of its divisors is an integer number (1074412521).

Almost surely, 2^6651125065 is an apocalyptic number.

6651125065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6651125065 is a deficient number, since it is larger than the sum of its proper divisors (1944175103).

6651125065 is a wasteful number, since it uses less digits than its factorization.

6651125065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102325019.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 6651125065 is about 81554.4300758702. The cubic root of 6651125065 is about 1880.6083990807.

The spelling of 6651125065 in words is "six billion, six hundred fifty-one million, one hundred twenty-five thousand, sixty-five".