66660088 has 64 divisors (see below), whose sum is σ = 142819200. Its totient is φ = 28897920.

The previous prime is 66660071. The next prime is 66660103. The reversal of 66660088 is 88006666.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66660088.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191931 + ... + 192277.

It is an arithmetic number, because the mean of its divisors is an integer number (2231550).

Almost surely, 2^66660088 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 66660088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71409600).

66660088 is an abundant number, since it is smaller than the sum of its proper divisors (76159112).

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

66660088 is a wasteful number, since it uses less digits than its factorization.

66660088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 66660088 is about 8164.5629399252. The cubic root of 66660088 is about 405.4667950063.

The spelling of 66660088 in words is "sixty-six million, six hundred sixty thousand, eighty-eight".