66547031040 has 528 divisors, whose sum is σ = 266215592448. Its totient is φ = 15055552512.

The previous prime is 66547031021. The next prime is 66547031077. The reversal of 66547031040 is 4013074566.

It is a happy number.

66547031040 is a `hidden beast` number, since 6 + 6 + 547 + 0 + 3 + 104 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 66547030986 and 66547031004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33222679 + ... + 33224681.

Almost surely, 2^66547031040 is an apocalyptic number.

66547031040 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 66547031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133107796224).

66547031040 is an abundant number, since it is smaller than the sum of its proper divisors (199668561408).

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

66547031040 is a wasteful number, since it uses less digits than its factorization.

66547031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 66547031040 in words is "sixty-six billion, five hundred forty-seven million, thirty-one thousand, forty".