66812837 has 8 divisors (see below), whose sum is σ = 82231296. Its totient is φ = 52862832.

The previous prime is 66812827. The next prime is 66812849. The reversal of 66812837 is 73821866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66812837 - 2¹² = 66808741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66812794 and 66812803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66812827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367013 + ... + 367194.

It is an arithmetic number, because the mean of its divisors is an integer number (10278912).

Almost surely, 2^66812837 is an apocalyptic number.

It is an amenable number.

66812837 is a deficient number, since it is larger than the sum of its proper divisors (15418459).

66812837 is a wasteful number, since it uses less digits than its factorization.

66812837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734227.

The product of its digits is 96768, while the sum is 41.

The square root of 66812837 is about 8173.9119765263. The cubic root of 66812837 is about 405.7762625478.

The spelling of 66812837 in words is "sixty-six million, eight hundred twelve thousand, eight hundred thirty-seven".