6726638951 has 4 divisors (see below), whose sum is σ = 7080672600. Its totient is φ = 6372605304.

The previous prime is 6726638927. The next prime is 6726638983. The reversal of 6726638951 is 1598366276.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6726638951 is a prime.

It is a super-2 number, since 2×6726638951² = 90495343154220760802, 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 = 6726638893 and 6726638902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6726658951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177016796 + ... + 177016833.

It is an arithmetic number, because the mean of its divisors is an integer number (1770168150).

Almost surely, 2^6726638951 is an apocalyptic number.

6726638951 is a deficient number, since it is larger than the sum of its proper divisors (354033649).

6726638951 is a wasteful number, since it uses less digits than its factorization.

6726638951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354033648.

The product of its digits is 3265920, while the sum is 53.

The square root of 6726638951 is about 82016.0895861294. The cubic root of 6726638951 is about 1887.6988268600.

The spelling of 6726638951 in words is "six billion, seven hundred twenty-six million, six hundred thirty-eight thousand, nine hundred fifty-one".