66681046 has 8 divisors (see below), whose sum is σ = 102347784. Its totient is φ = 32565120.

The previous prime is 66681037. The next prime is 66681053. The reversal of 66681046 is 64018666.

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

It is a junction number, because it is equal to n+sod(n) for n = 66680996 and 66681014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387595 + ... + 387766.

It is an arithmetic number, because the mean of its divisors is an integer number (12793473).

Almost surely, 2^66681046 is an apocalyptic number.

66681046 is a deficient number, since it is larger than the sum of its proper divisors (35666738).

66681046 is a wasteful number, since it uses less digits than its factorization.

66681046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775406.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 66681046 is about 8165.8463125386. The cubic root of 66681046 is about 405.5092836125.

The spelling of 66681046 in words is "sixty-six million, six hundred eighty-one thousand, forty-six".