66331488 has 24 divisors (see below), whose sum is σ = 174120408. Its totient is φ = 22110464.

The previous prime is 66331483. The next prime is 66331511. The reversal of 66331488 is 88413366.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66331483) 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, 345381 + ... + 345572.

It is an arithmetic number, because the mean of its divisors is an integer number (7255017).

Almost surely, 2^66331488 is an apocalyptic number.

It is an amenable number.

66331488 is an abundant number, since it is smaller than the sum of its proper divisors (107788920).

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

66331488 is a wasteful number, since it uses less digits than its factorization.

66331488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690966 (or 690958 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 66331488 is about 8144.4145277607. The cubic root of 66331488 is about 404.7994495558.

The spelling of 66331488 in words is "sixty-six million, three hundred thirty-one thousand, four hundred eighty-eight".