66552128 has 28 divisors (see below), whose sum is σ = 133746240. Its totient is φ = 32852352.

The previous prime is 66552121. The next prime is 66552131. The reversal of 66552128 is 82125566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66552121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526 + ... + 11637.

Almost surely, 2^66552128 is an apocalyptic number.

It is an amenable number.

66552128 is an abundant number, since it is smaller than the sum of its proper divisors (67194112).

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

66552128 is a wasteful number, since it uses less digits than its factorization.

66552128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13254 (or 13244 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 66552128 is about 8157.9487617906. The cubic root of 66552128 is about 405.2477841537.

The spelling of 66552128 in words is "sixty-six million, five hundred fifty-two thousand, one hundred twenty-eight".