66260506 has 48 divisors (see below), whose sum is σ = 113629824. Its totient is φ = 28933632.

The previous prime is 66260503. The next prime is 66260527. The reversal of 66260506 is 60506266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66260501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 683050 + ... + 683146.

It is an arithmetic number, because the mean of its divisors is an integer number (2367288).

Almost surely, 2^66260506 is an apocalyptic number.

66260506 is a deficient number, since it is larger than the sum of its proper divisors (47369318).

66260506 is a wasteful number, since it uses less digits than its factorization.

66260506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66260506 is about 8140.0556509154. The cubic root of 66260506 is about 404.6550046835.

It can be divided in two parts, 66260 and 506, that added together give a palindrome (66766).

The spelling of 66260506 in words is "sixty-six million, two hundred sixty thousand, five hundred six".