6757378121 has 4 divisors (see below), whose sum is σ = 7277176452. Its totient is φ = 6237579792.

The previous prime is 6757378087. The next prime is 6757378157. The reversal of 6757378121 is 1218737576.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1201315600 + 5556062521 = 34660^2 + 74539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6757378121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6757378021) 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, 259899146 + ... + 259899171.

It is an arithmetic number, because the mean of its divisors is an integer number (1819294113).

Almost surely, 2^6757378121 is an apocalyptic number.

It is an amenable number.

6757378121 is a deficient number, since it is larger than the sum of its proper divisors (519798331).

6757378121 is a wasteful number, since it uses less digits than its factorization.

6757378121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519798330.

The product of its digits is 493920, while the sum is 47.

The square root of 6757378121 is about 82203.2731769240. The cubic root of 6757378121 is about 1890.5699055870.

The spelling of 6757378121 in words is "six billion, seven hundred fifty-seven million, three hundred seventy-eight thousand, one hundred twenty-one".