6626731 has 4 divisors (see below), whose sum is σ = 6634000. Its totient is φ = 6619464.

The previous prime is 6626729. The next prime is 6626743. The reversal of 6626731 is 1376266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1376266 = 2 ⋅688133.

It is a cyclic number.

It is not a de Polignac number, because 6626731 - 2¹ = 6626729 is a prime.

It is a super-2 number, since 2×6626731² = 87827127492722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6626693 and 6626702.

It is not an unprimeable number, because it can be changed into a prime (6626701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031 + ... + 4168.

It is an arithmetic number, because the mean of its divisors is an integer number (1658500).

Almost surely, 2^6626731 is an apocalyptic number.

6626731 is a deficient number, since it is larger than the sum of its proper divisors (7269).

6626731 is a wasteful number, since it uses less digits than its factorization.

6626731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7268.

The product of its digits is 9072, while the sum is 31.

The square root of 6626731 is about 2574.2437724505. The cubic root of 6626731 is about 187.8306438480.

The spelling of 6626731 in words is "six million, six hundred twenty-six thousand, seven hundred thirty-one".