6631627169 has 4 divisors (see below), whose sum is σ = 6634163844. Its totient is φ = 6629090496.

The previous prime is 6631627063. The next prime is 6631627181. The reversal of 6631627169 is 9617261366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5827337569 + 804289600 = 76337^2 + 28360^2 .

It is a cyclic number.

It is not a de Polignac number, because 6631627169 - 2⁸ = 6631626913 is a prime.

It is a super-2 number, since 2×6631627169² = 87956957817237909122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6631627669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264412 + ... + 1269645.

It is an arithmetic number, because the mean of its divisors is an integer number (1658540961).

Almost surely, 2^6631627169 is an apocalyptic number.

It is an amenable number.

6631627169 is a deficient number, since it is larger than the sum of its proper divisors (2536675).

6631627169 is a wasteful number, since it uses less digits than its factorization.

6631627169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536674.

The product of its digits is 489888, while the sum is 47.

The square root of 6631627169 is about 81434.8031802128. The cubic root of 6631627169 is about 1878.7689209986.

The spelling of 6631627169 in words is "six billion, six hundred thirty-one million, six hundred twenty-seven thousand, one hundred sixty-nine".