6646652137 has 8 divisors (see below), whose sum is σ = 6718713480. Its totient is φ = 6574713600.

The previous prime is 6646652113. The next prime is 6646652183. The reversal of 6646652137 is 7312566466.

It can be written as a sum of positive squares in 4 ways, for example, as 2331344656 + 4315307481 = 48284^2 + 65691^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6646652137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6646652107) 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, 80289 + ... + 140497.

It is an arithmetic number, because the mean of its divisors is an integer number (839839185).

Almost surely, 2^6646652137 is an apocalyptic number.

It is an amenable number.

6646652137 is a deficient number, since it is larger than the sum of its proper divisors (72061343).

6646652137 is a wasteful number, since it uses less digits than its factorization.

6646652137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61403.

The product of its digits is 1088640, while the sum is 46.

The square root of 6646652137 is about 81527.0025022385. The cubic root of 6646652137 is about 1880.1867304527.

The spelling of 6646652137 in words is "six billion, six hundred forty-six million, six hundred fifty-two thousand, one hundred thirty-seven".