66964766 has 16 divisors (see below), whose sum is σ = 109842048. Its totient is φ = 30365400.

The previous prime is 66964699. The next prime is 66964771. The reversal of 66964766 is 66746966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6311 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (6865128).

Almost surely, 2^66964766 is an apocalyptic number.

66964766 is a deficient number, since it is larger than the sum of its proper divisors (42877282).

66964766 is a wasteful number, since it uses less digits than its factorization.

66964766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7327.

The product of its digits is 1959552, while the sum is 50.

The square root of 66964766 is about 8183.2002297390. The cubic root of 66964766 is about 406.0836012493.

The spelling of 66964766 in words is "sixty-six million, nine hundred sixty-four thousand, seven hundred sixty-six".