66704694 has 32 divisors (see below), whose sum is σ = 152741376. Its totient is φ = 19024320.

The previous prime is 66704689. The next prime is 66704749. The reversal of 66704694 is 49640766.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon 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 in 15 ways as a sum of consecutive naturals, for example, 30919 + ... + 33005.

It is an arithmetic number, because the mean of its divisors is an integer number (4773168).

Almost surely, 2^66704694 is an apocalyptic number.

66704694 is an abundant number, since it is smaller than the sum of its proper divisors (86036682).

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

66704694 is a wasteful number, since it uses less digits than its factorization.

66704694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 66704694 is about 8167.2941663687. The cubic root of 66704694 is about 405.5572150249.

The spelling of 66704694 in words is "sixty-six million, seven hundred four thousand, six hundred ninety-four".