66555234 has 24 divisors (see below), whose sum is σ = 144471600. Its totient is φ = 22143768.

The previous prime is 66555199. The next prime is 66555241. The reversal of 66555234 is 43255566.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7417 + ... + 13715.

It is an arithmetic number, because the mean of its divisors is an integer number (6019650).

Almost surely, 2^66555234 is an apocalyptic number.

66555234 is an abundant number, since it is smaller than the sum of its proper divisors (77916366).

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

66555234 is a wasteful number, since it uses less digits than its factorization.

66555234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6894 (or 6891 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 66555234 is about 8158.1391260507. The cubic root of 66555234 is about 405.2540883851.

The spelling of 66555234 in words is "sixty-six million, five hundred fifty-five thousand, two hundred thirty-four".