6724486981 has 4 divisors (see below), whose sum is σ = 6726553600. Its totient is φ = 6722420364.

The previous prime is 6724486961. The next prime is 6724487009. The reversal of 6724486981 is 1896844276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6724486981 - 2⁵ = 6724486949 is a prime.

It is a super-2 number, since 2×6724486981² = 90437450315276988722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6724486961) 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, 1028421 + ... + 1034938.

It is an arithmetic number, because the mean of its divisors is an integer number (1681638400).

Almost surely, 2^6724486981 is an apocalyptic number.

It is an amenable number.

6724486981 is a deficient number, since it is larger than the sum of its proper divisors (2066619).

6724486981 is a wasteful number, since it uses less digits than its factorization.

6724486981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066618.

The product of its digits is 4644864, while the sum is 55.

The square root of 6724486981 is about 82002.9693425793. The cubic root of 6724486981 is about 1887.4975027144.

The spelling of 6724486981 in words is "six billion, seven hundred twenty-four million, four hundred eighty-six thousand, nine hundred eighty-one".