6921349677 has 36 divisors (see below), whose sum is σ = 11091880800. Its totient is φ = 4155484080.

The previous prime is 6921349651. The next prime is 6921349693. The reversal of 6921349677 is 7769431296.

It is a happy number.

6921349677 is a `hidden beast` number, since 69 + 21 + 3 + 496 + 77 = 666.

It is not a de Polignac number, because 6921349677 - 2¹⁶ = 6921284141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921349637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 86824 + ... + 146222.

It is an arithmetic number, because the mean of its divisors is an integer number (308107800).

Almost surely, 2^6921349677 is an apocalyptic number.

It is an amenable number.

6921349677 is a deficient number, since it is larger than the sum of its proper divisors (4170531123).

6921349677 is a wasteful number, since it uses less digits than its factorization.

6921349677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59534 (or 59520 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 6921349677 is about 83194.6493291486. The cubic root of 6921349677 is about 1905.7397693147.

The spelling of 6921349677 in words is "six billion, nine hundred twenty-one million, three hundred forty-nine thousand, six hundred seventy-seven".