66700500 has 96 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 17430400.

The previous prime is 66700477. The next prime is 66700519. The reversal of 66700500 is 500766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79081 + ... + 79919.

It is an arithmetic number, because the mean of its divisors is an integer number (2063880).

Almost surely, 2^66700500 is an apocalyptic number.

66700500 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 66700500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

66700500 is an abundant number, since it is smaller than the sum of its proper divisors (131431980).

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

66700500 is a wasteful number, since it uses less digits than its factorization.

66700500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 66700500 is about 8167.0374065508. The cubic root of 66700500 is about 405.5487151602.

The spelling of 66700500 in words is "sixty-six million, seven hundred thousand, five hundred".