6777458749 has 4 divisors (see below), whose sum is σ = 6777646560. Its totient is φ = 6777270940.

The previous prime is 6777458729. The next prime is 6777458761. The reversal of 6777458749 is 9478547776.

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 6777458749 - 2⁷ = 6777458621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777458729) 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, 20809 + ... + 118270.

It is an arithmetic number, because the mean of its divisors is an integer number (1694411640).

Almost surely, 2^6777458749 is an apocalyptic number.

It is an amenable number.

6777458749 is a deficient number, since it is larger than the sum of its proper divisors (187811).

6777458749 is a wasteful number, since it uses less digits than its factorization.

6777458749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187810.

The product of its digits is 82978560, while the sum is 64.

The square root of 6777458749 is about 82325.3226474090. The cubic root of 6777458749 is about 1892.4407637349.

The spelling of 6777458749 in words is "six billion, seven hundred seventy-seven million, four hundred fifty-eight thousand, seven hundred forty-nine".