66201204 has 12 divisors (see below), whose sum is σ = 154469504. Its totient is φ = 22067064.

The previous prime is 66201193. The next prime is 66201227. The reversal of 66201204 is 40210266.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×66201204² = 8765198822099232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758372 + ... + 2758395.

Almost surely, 2^66201204 is an apocalyptic number.

It is an amenable number.

66201204 is an abundant number, since it is smaller than the sum of its proper divisors (88268300).

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

66201204 is a wasteful number, since it uses less digits than its factorization.

66201204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516774 (or 5516772 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 66201204 is about 8136.4122314445. The cubic root of 66201204 is about 404.5342489220.

The spelling of 66201204 in words is "sixty-six million, two hundred one thousand, two hundred four".