66942600 has 96 divisors (see below), whose sum is σ = 219762720. Its totient is φ = 16798720.

The previous prime is 66942541. The next prime is 66942607. The reversal of 66942600 is 624966.

It is not an unprimeable number, because it can be changed into a prime (66942607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6919 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (2289195).

Almost surely, 2^66942600 is an apocalyptic number.

66942600 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 66942600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109881360).

66942600 is an abundant number, since it is smaller than the sum of its proper divisors (152820120).

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

66942600 is a wasteful number, since it uses less digits than its factorization.

66942600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599 (or 6590 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 66942600 is about 8181.8457575293. The cubic root of 66942600 is about 406.0387904083.

The spelling of 66942600 in words is "sixty-six million, nine hundred forty-two thousand, six hundred".