66786396 has 48 divisors (see below), whose sum is σ = 160347264. Its totient is φ = 21623616.

The previous prime is 66786359. The next prime is 66786403. The reversal of 66786396 is 69368766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178866 + ... + 179238.

It is an arithmetic number, because the mean of its divisors is an integer number (3340568).

Almost surely, 2^66786396 is an apocalyptic number.

It is an amenable number.

66786396 is an abundant number, since it is smaller than the sum of its proper divisors (93560868).

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

66786396 is a wasteful number, since it uses less digits than its factorization.

66786396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 768 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 51.

The square root of 66786396 is about 8172.2944146672. The cubic root of 66786396 is about 405.7227271980.

The spelling of 66786396 in words is "sixty-six million, seven hundred eighty-six thousand, three hundred ninety-six".