66871356 has 24 divisors (see below), whose sum is σ = 156234624. Its totient is φ = 22261680.

The previous prime is 66871351. The next prime is 66871379. The reversal of 66871356 is 65317866.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66871351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7441 + ... + 13751.

It is an arithmetic number, because the mean of its divisors is an integer number (6509776).

Almost surely, 2^66871356 is an apocalyptic number.

It is an amenable number.

66871356 is an abundant number, since it is smaller than the sum of its proper divisors (89363268).

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

66871356 is a wasteful number, since it uses less digits than its factorization.

66871356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7201 (or 7199 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 66871356 is about 8177.4908132018. The cubic root of 66871356 is about 405.8946963344.

The spelling of 66871356 in words is "sixty-six million, eight hundred seventy-one thousand, three hundred fifty-six".