66455312 has 160 divisors (see below), whose sum is σ = 179988480. Its totient is φ = 22947840.

The previous prime is 66455309. The next prime is 66455359. The reversal of 66455312 is 21355466.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397853 + ... + 398019.

It is an arithmetic number, because the mean of its divisors is an integer number (1124928).

Almost surely, 2^66455312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66455312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89994240).

66455312 is an abundant number, since it is smaller than the sum of its proper divisors (113533168).

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

66455312 is a wasteful number, since it uses less digits than its factorization.

66455312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 223 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 66455312 is about 8152.0127575955. The cubic root of 66455312 is about 405.0511788192.

The spelling of 66455312 in words is "sixty-six million, four hundred fifty-five thousand, three hundred twelve".