66671316 has 24 divisors (see below), whose sum is σ = 172851840. Its totient is φ = 22223736.

The previous prime is 66671303. The next prime is 66671321. The reversal of 66671316 is 61317666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308556 + ... + 308771.

It is an arithmetic number, because the mean of its divisors is an integer number (7202160).

Almost surely, 2^66671316 is an apocalyptic number.

It is an amenable number.

66671316 is an abundant number, since it is smaller than the sum of its proper divisors (106180524).

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

66671316 is a wasteful number, since it uses less digits than its factorization.

66671316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617340 (or 617332 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 66671316 is about 8165.2505166712. The cubic root of 66671316 is about 405.4895588806.

The spelling of 66671316 in words is "sixty-six million, six hundred seventy-one thousand, three hundred sixteen".