66240075258 has 48 divisors (see below), whose sum is σ = 164218803840. Its totient is φ = 18903148128.

The previous prime is 66240075197. The next prime is 66240075287. The reversal of 66240075258 is 85257004266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207585 + ... + 419012.

It is an arithmetic number, because the mean of its divisors is an integer number (3421225080).

Almost surely, 2^66240075258 is an apocalyptic number.

66240075258 is an abundant number, since it is smaller than the sum of its proper divisors (97978728582).

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

66240075258 is a wasteful number, since it uses less digits than its factorization.

66240075258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627451 (or 627448 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 66240075258 in words is "sixty-six billion, two hundred forty million, seventy-five thousand, two hundred fifty-eight".