66700540 has 24 divisors (see below), whose sum is σ = 141084720. Its totient is φ = 26487168.

The previous prime is 66700523. The next prime is 66700541. The reversal of 66700540 is 4500766.

It is a junction number, because it is equal to n+sod(n) for n = 66700499 and 66700508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9217 + ... + 14776.

It is an arithmetic number, because the mean of its divisors is an integer number (5878530).

Almost surely, 2^66700540 is an apocalyptic number.

It is an amenable number.

66700540 is an abundant number, since it is smaller than the sum of its proper divisors (74384180).

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

66700540 is a wasteful number, since it uses less digits than its factorization.

66700540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24141 (or 24139 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 66700540 is about 8167.0398554189. The cubic root of 66700540 is about 405.5487962288.

The spelling of 66700540 in words is "sixty-six million, seven hundred thousand, five hundred forty".