66109488 has 20 divisors (see below), whose sum is σ = 170782968. Its totient is φ = 22036480.

The previous prime is 66109471. The next prime is 66109489. The reversal of 66109488 is 88490166.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66109489) 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, 688593 + ... + 688688.

Almost surely, 2^66109488 is an apocalyptic number.

It is an amenable number.

66109488 is an abundant number, since it is smaller than the sum of its proper divisors (104673480).

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

66109488 is a wasteful number, since it uses less digits than its factorization.

66109488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377292 (or 1377286 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 66109488 is about 8130.7741328855. The cubic root of 66109488 is about 404.3473469317.

The spelling of 66109488 in words is "sixty-six million, one hundred nine thousand, four hundred eighty-eight".