166647664 has 10 divisors (see below), whose sum is σ = 322879880. Its totient is φ = 83323824.

The previous prime is 166647647. The next prime is 166647671. The reversal of 166647664 is 466746661.

It is a happy number.

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 as a sum of consecutive naturals, namely, 5207724 + ... + 5207755.

It is an arithmetic number, because the mean of its divisors is an integer number (32287988).

Almost surely, 2^166647664 is an apocalyptic number.

It is an amenable number.

166647664 is a deficient number, since it is larger than the sum of its proper divisors (156232216).

166647664 is a wasteful number, since it uses less digits than its factorization.

166647664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10415487 (or 10415481 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 166647664 is about 12909.2084962634. The cubic root of 166647664 is about 550.3002922132.

The spelling of 166647664 in words is "one hundred sixty-six million, six hundred forty-seven thousand, six hundred sixty-four".