6551999967 has 4 divisors (see below), whose sum is σ = 8735999960. Its totient is φ = 4367999976.

The previous prime is 6551999939. The next prime is 6551999969. The reversal of 6551999967 is 7699991556.

It is a happy number.

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

It is not a de Polignac number, because 6551999967 - 2¹⁵ = 6551967199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6551999898 and 6551999907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551999969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1091999992 + ... + 1091999997.

It is an arithmetic number, because the mean of its divisors is an integer number (2183999990).

Almost surely, 2^6551999967 is an apocalyptic number.

6551999967 is a deficient number, since it is larger than the sum of its proper divisors (2183999993).

6551999967 is a wasteful number, since it uses less digits than its factorization.

6551999967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183999992.

The product of its digits is 41334300, while the sum is 66.

The square root of 6551999967 is about 80944.4251755487. The cubic root of 6551999967 is about 1871.2190443289.

The spelling of 6551999967 in words is "six billion, five hundred fifty-one million, nine hundred ninety-nine thousand, nine hundred sixty-seven".