6667631643 has 8 divisors (see below), whose sum is σ = 9096923968. Its totient is φ = 4341713544.

The previous prime is 6667631611. The next prime is 6667631669. The reversal of 6667631643 is 3461367666.

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

It is not a de Polignac number, because 6667631643 - 2⁵ = 6667631611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6667631592 and 6667631601.

It is not an unprimeable number, because it can be changed into a prime (6667631143) 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, 25843405 + ... + 25843662.

It is an arithmetic number, because the mean of its divisors is an integer number (1137115496).

Almost surely, 2^6667631643 is an apocalyptic number.

6667631643 is a deficient number, since it is larger than the sum of its proper divisors (2429292325).

6667631643 is a wasteful number, since it uses less digits than its factorization.

6667631643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51687113.

The product of its digits is 1959552, while the sum is 48.

The square root of 6667631643 is about 81655.5671280287. The cubic root of 6667631643 is about 1882.1628611307.

The spelling of 6667631643 in words is "six billion, six hundred sixty-seven million, six hundred thirty-one thousand, six hundred forty-three".