65894875506 has 24 divisors (see below), whose sum is σ = 144106554384. Its totient is φ = 21759677880.

The previous prime is 65894875481. The next prime is 65894875511. The reversal of 65894875506 is 60557849856.

65894875506 is a `hidden beast` number, since 6 + 5 + 89 + 48 + 7 + 5 + 506 = 666.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 17104740 + ... + 17108591.

It is an arithmetic number, because the mean of its divisors is an integer number (6004439766).

Almost surely, 2^65894875506 is an apocalyptic number.

65894875506 is an abundant number, since it is smaller than the sum of its proper divisors (78211678878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65894875506 is a wasteful number, since it uses less digits than its factorization.

65894875506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34213446 (or 34213443 counting only the distinct ones).

The product of its (nonzero) digits is 72576000, while the sum is 63.

The spelling of 65894875506 in words is "sixty-five billion, eight hundred ninety-four million, eight hundred seventy-five thousand, five hundred six".