6737921663 has 6 divisors (see below), whose sum is σ = 7406145432. Its totient is φ = 6125383220.

The previous prime is 6737921653. The next prime is 6737921669. The reversal of 6737921663 is 3661297376.

It is a happy number.

It is not a de Polignac number, because 6737921663 - 2⁴ = 6737921647 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 (6737921669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27842531 + ... + 27842772.

It is an arithmetic number, because the mean of its divisors is an integer number (1234357572).

Almost surely, 2^6737921663 is an apocalyptic number.

6737921663 is a deficient number, since it is larger than the sum of its proper divisors (668223769).

6737921663 is a wasteful number, since it uses less digits than its factorization.

6737921663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55685325 (or 55685314 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 50.

The square root of 6737921663 is about 82084.8442953996. The cubic root of 6737921663 is about 1888.7536610005.

The spelling of 6737921663 in words is "six billion, seven hundred thirty-seven million, nine hundred twenty-one thousand, six hundred sixty-three".