6475875721 has 24 divisors (see below), whose sum is σ = 7627284000. Its totient is φ = 5481729792.

The previous prime is 6475875719. The next prime is 6475875751. The reversal of 6475875721 is 1275785746.

It is not a de Polignac number, because 6475875721 - 2¹ = 6475875719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6475875751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1849030 + ... + 1852528.

It is an arithmetic number, because the mean of its divisors is an integer number (317803500).

Almost surely, 2^6475875721 is an apocalyptic number.

It is an amenable number.

6475875721 is a deficient number, since it is larger than the sum of its proper divisors (1151408279).

6475875721 is a wasteful number, since it uses less digits than its factorization.

6475875721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973 (or 3966 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 52.

The square root of 6475875721 is about 80472.8259787116. The cubic root of 6475875721 is about 1863.9438920442.

The spelling of 6475875721 in words is "six billion, four hundred seventy-five million, eight hundred seventy-five thousand, seven hundred twenty-one".