6749766786431 has 8 divisors (see below), whose sum is σ = 6985110423984. Its totient is φ = 6517208280960.

The previous prime is 6749766786421. The next prime is 6749766786437. The reversal of 6749766786431 is 1346876679476.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6749766786431 is a prime.

It is a super-2 number, since 2×6749766786431² (a number of 26 digits) 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 (6749766786437) 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, 696278090 + ... + 696287783.

It is an arithmetic number, because the mean of its divisors is an integer number (873138802998).

Almost surely, 2^{6749766786431} is an apocalyptic number.

6749766786431 is a deficient number, since it is larger than the sum of its proper divisors (235343637553).

6749766786431 is a wasteful number, since it uses less digits than its factorization.

6749766786431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392566041.

The product of its digits is 1536288768, while the sum is 74.

The spelling of 6749766786431 in words is "six trillion, seven hundred forty-nine billion, seven hundred sixty-six million, seven hundred eighty-six thousand, four hundred thirty-one".