6764641421 has 16 divisors (see below), whose sum is σ = 7267987200. Its totient is φ = 6276916800.

The previous prime is 6764641397. The next prime is 6764641463. The reversal of 6764641421 is 1241464676.

It is a cyclic number.

It is not a de Polignac number, because 6764641421 - 2¹⁰ = 6764640397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6764641721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264791 + ... + 289211.

It is an arithmetic number, because the mean of its divisors is an integer number (454249200).

Almost surely, 2^6764641421 is an apocalyptic number.

6764641421 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6764641421 is a deficient number, since it is larger than the sum of its proper divisors (503345779).

6764641421 is a wasteful number, since it uses less digits than its factorization.

6764641421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24740.

The product of its digits is 193536, while the sum is 41.

The square root of 6764641421 is about 82247.4402094071. The cubic root of 6764641421 is about 1891.2470350461.

The spelling of 6764641421 in words is "six billion, seven hundred sixty-four million, six hundred forty-one thousand, four hundred twenty-one".