66266508 has 96 divisors (see below), whose sum is σ = 199503360. Its totient is φ = 16611840.

The previous prime is 66266507. The next prime is 66266513. The reversal of 66266508 is 80566266.

It is not an unprimeable number, because it can be changed into a prime (66266503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25560 + ... + 28032.

It is an arithmetic number, because the mean of its divisors is an integer number (2078160).

Almost surely, 2^66266508 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 66266508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99751680).

66266508 is an abundant number, since it is smaller than the sum of its proper divisors (133236852).

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

66266508 is a wasteful number, since it uses less digits than its factorization.

66266508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527 (or 2525 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 66266508 is about 8140.4243132652. The cubic root of 66266508 is about 404.6672224491.

The spelling of 66266508 in words is "sixty-six million, two hundred sixty-six thousand, five hundred eight".