66258261661248 has 84 divisors (see below), whose sum is σ = 190046453828608. Its totient is φ = 22071072602880.

The previous prime is 66258261661237. The next prime is 66258261661259. The reversal of 66258261661248 is 84216616285266.

66258261661248 is a `hidden beast` number, since 6 + 6 + 2 + 5 + 8 + 2 + 6 + 1 + 6 + 612 + 4 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (66258261661237) and next prime (66258261661259).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38252536 + ... + 39947127.

Almost surely, 2^{66258261661248} is an apocalyptic number.

It is an amenable number.

66258261661248 is an abundant number, since it is smaller than the sum of its proper divisors (123788192167360).

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

66258261661248 is a wasteful number, since it uses less digits than its factorization.

66258261661248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78201152 (or 78201139 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 63.

The spelling of 66258261661248 in words is "sixty-six trillion, two hundred fifty-eight billion, two hundred sixty-one million, six hundred sixty-one thousand, two hundred forty-eight".