66712382 has 32 divisors (see below), whose sum is σ = 115948800. Its totient is φ = 28706040.

The previous prime is 66712367. The next prime is 66712391. The reversal of 66712382 is 28321766.

It is a happy number.

It is a super-2 number, since 2×66712382² = 8901083824227848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49919 + ... + 51237.

It is an arithmetic number, because the mean of its divisors is an integer number (3623400).

Almost surely, 2^66712382 is an apocalyptic number.

66712382 is a deficient number, since it is larger than the sum of its proper divisors (49236418).

66712382 is a wasteful number, since it uses less digits than its factorization.

66712382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1351 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 66712382 is about 8167.7648105219. The cubic root of 66712382 is about 405.5727951583.

The spelling of 66712382 in words is "sixty-six million, seven hundred twelve thousand, three hundred eighty-two".