66455855676 has 48 divisors (see below), whose sum is σ = 196906241280. Its totient is φ = 18987387120.

The previous prime is 66455855671. The next prime is 66455855707. The reversal of 66455855676 is 67655855466.

66455855676 is a `hidden beast` number, since 6 + 6 + 4 + 5 + 5 + 8 + 556 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66455855671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43951530 + ... + 43953041.

It is an arithmetic number, because the mean of its divisors is an integer number (4102213360).

Almost surely, 2^66455855676 is an apocalyptic number.

It is an amenable number.

66455855676 is an abundant number, since it is smaller than the sum of its proper divisors (130450385604).

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

66455855676 is a wasteful number, since it uses less digits than its factorization.

66455855676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87904591 (or 87904583 counting only the distinct ones).

The product of its digits is 181440000, while the sum is 63.

The spelling of 66455855676 in words is "sixty-six billion, four hundred fifty-five million, eight hundred fifty-five thousand, six hundred seventy-six".