66212782 has 8 divisors (see below), whose sum is σ = 100343376. Its totient is φ = 32764992.

The previous prime is 66212779. The next prime is 66212821. The reversal of 66212782 is 28721266.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170458 + ... + 170845.

It is an arithmetic number, because the mean of its divisors is an integer number (12542922).

Almost surely, 2^66212782 is an apocalyptic number.

66212782 is a deficient number, since it is larger than the sum of its proper divisors (34130594).

66212782 is a wasteful number, since it uses less digits than its factorization.

66212782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341402.

The product of its digits is 16128, while the sum is 34.

The square root of 66212782 is about 8137.1236932961. The cubic root of 66212782 is about 404.5578306911.

The spelling of 66212782 in words is "sixty-six million, two hundred twelve thousand, seven hundred eighty-two".