66074849280 has 1248 divisors, whose sum is σ = 278211967488. Its totient is φ = 14863564800.

The previous prime is 66074849221. The next prime is 66074849287. The reversal of 66074849280 is 8294847066.

66074849280 is a `hidden beast` number, since 6 + 6 + 0 + 74 + 8 + 492 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (66074849287) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 930631645 + ... + 930631715.

It is an arithmetic number, because the mean of its divisors is an integer number (222926256).

Almost surely, 2^66074849280 is an apocalyptic number.

66074849280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66074849280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139105983744).

66074849280 is an abundant number, since it is smaller than the sum of its proper divisors (212137118208).

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

66074849280 is a wasteful number, since it uses less digits than its factorization.

66074849280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 66074849280 in words is "sixty-six billion, seventy-four million, eight hundred forty-nine thousand, two hundred eighty".