6511720675 has 12 divisors (see below), whose sum is σ = 8075655000. Its totient is φ = 5208653120.

The previous prime is 6511720651. The next prime is 6511720723. The reversal of 6511720675 is 5760271156.

It is a happy number.

It is not a de Polignac number, because 6511720675 - 2¹³ = 6511712483 is a prime.

It is a super-2 number, since 2×6511720675² = 84805012298444911250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234951 + ... + 261199.

It is an arithmetic number, because the mean of its divisors is an integer number (672971250).

Almost surely, 2^6511720675 is an apocalyptic number.

6511720675 is a deficient number, since it is larger than the sum of its proper divisors (1563934325).

6511720675 is a wasteful number, since it uses less digits than its factorization.

6511720675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36182 (or 36177 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 6511720675 is about 80695.2332854921. The cubic root of 6511720675 is about 1867.3766369112.

The spelling of 6511720675 in words is "six billion, five hundred eleven million, seven hundred twenty thousand, six hundred seventy-five".