66089568 has 24 divisors (see below), whose sum is σ = 173485368. Its totient is φ = 22029824.

The previous prime is 66089563. The next prime is 66089593. The reversal of 66089568 is 86598066.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66089561) 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, 344121 + ... + 344312.

It is an arithmetic number, because the mean of its divisors is an integer number (7228557).

Almost surely, 2^66089568 is an apocalyptic number.

It is an amenable number.

66089568 is an abundant number, since it is smaller than the sum of its proper divisors (107395800).

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

66089568 is a wasteful number, since it uses less digits than its factorization.

66089568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688446 (or 688438 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 66089568 is about 8129.5490649851. The cubic root of 66089568 is about 404.3067304306.

The spelling of 66089568 in words is "sixty-six million, eighty-nine thousand, five hundred sixty-eight".