66345888 has 48 divisors (see below), whose sum is σ = 199039680. Its totient is φ = 18955776.

The previous prime is 66345887. The next prime is 66345899. The reversal of 66345888 is 88854366.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (66345887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48693 + ... + 50036.

It is an arithmetic number, because the mean of its divisors is an integer number (4146660).

Almost surely, 2^66345888 is an apocalyptic number.

It is an amenable number.

66345888 is an abundant number, since it is smaller than the sum of its proper divisors (132693792).

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

66345888 is a wasteful number, since it uses less digits than its factorization.

66345888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98749 (or 98741 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 66345888 is about 8145.2985212330. The cubic root of 66345888 is about 404.8287402717.

The spelling of 66345888 in words is "sixty-six million, three hundred forty-five thousand, eight hundred eighty-eight".