6756748981 has 4 divisors (see below), whose sum is σ = 6758227872. Its totient is φ = 6755270092.

The previous prime is 6756748951. The next prime is 6756748987. The reversal of 6756748981 is 1898476576.

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 6756748981 - 2⁵ = 6756748949 is a prime.

It is a super-2 number, since 2×6756748981² = 91307313584489076722, 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 (6756748987) 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, 732571 + ... + 741736.

It is an arithmetic number, because the mean of its divisors is an integer number (1689556968).

Almost surely, 2^6756748981 is an apocalyptic number.

It is an amenable number.

6756748981 is a deficient number, since it is larger than the sum of its proper divisors (1478891).

6756748981 is a wasteful number, since it uses less digits than its factorization.

6756748981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478890.

The product of its digits is 20321280, while the sum is 61.

The square root of 6756748981 is about 82199.4463545832. The cubic root of 6756748981 is about 1890.5112304596.

The spelling of 6756748981 in words is "six billion, seven hundred fifty-six million, seven hundred forty-eight thousand, nine hundred eighty-one".