66911200 has 36 divisors (see below), whose sum is σ = 163348920. Its totient is φ = 26764160.

The previous prime is 66911191. The next prime is 66911203. The reversal of 66911200 is 211966.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66911203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41020 + ... + 42619.

It is an arithmetic number, because the mean of its divisors is an integer number (4537470).

Almost surely, 2^66911200 is an apocalyptic number.

It is an amenable number.

66911200 is an abundant number, since it is smaller than the sum of its proper divisors (96437720).

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

66911200 is a wasteful number, since it uses less digits than its factorization.

66911200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83659 (or 83646 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 66911200 is about 8179.9266500379. The cubic root of 66911200 is about 405.9752951553.

The spelling of 66911200 in words is "sixty-six million, nine hundred eleven thousand, two hundred".