6697496921 has 8 divisors (see below), whose sum is σ = 6708695400. Its totient is φ = 6686310400.

The previous prime is 6697496917. The next prime is 6697496933. The reversal of 6697496921 is 1296947966.

It can be written as a sum of positive squares in 4 ways, for example, as 33223696 + 6664273225 = 5764^2 + 81635^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6697496921 - 2² = 6697496917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6697496021) 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, 2254325 + ... + 2257293.

It is an arithmetic number, because the mean of its divisors is an integer number (838586925).

Almost surely, 2^6697496921 is an apocalyptic number.

It is an amenable number.

6697496921 is a deficient number, since it is larger than the sum of its proper divisors (11198479).

6697496921 is a wasteful number, since it uses less digits than its factorization.

6697496921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979.

The product of its digits is 8817984, while the sum is 59.

The square root of 6697496921 is about 81838.2363018656. The cubic root of 6697496921 is about 1884.9688349324.

The spelling of 6697496921 in words is "six billion, six hundred ninety-seven million, four hundred ninety-six thousand, nine hundred twenty-one".