66556337541120 has 1560 divisors, whose sum is σ = 279259621812864. Its totient is φ = 15118697889792.

The previous prime is 66556337541097. The next prime is 66556337541143. The reversal of 66556337541120 is 2114573365566.

66556337541120 is a `hidden beast` number, since 6 + 6 + 5 + 5 + 63 + 37 + 541 + 1 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (66556337541097) and next prime (66556337541143).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 13574612589 + ... + 13574617491.

Almost surely, 2^{66556337541120} is an apocalyptic number.

66556337541120 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 66556337541120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139629810906432).

66556337541120 is an abundant number, since it is smaller than the sum of its proper divisors (212703284271744).

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

66556337541120 is a wasteful number, since it uses less digits than its factorization.

66556337541120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125 (or 5087 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 66556337541120 in words is "sixty-six trillion, five hundred fifty-six billion, three hundred thirty-seven million, five hundred forty-one thousand, one hundred twenty".