66464894 has 16 divisors (see below), whose sum is σ = 105462432. Its totient is φ = 31350528.

The previous prime is 66464887. The next prime is 66464903. The reversal of 66464894 is 49846466.

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 in 7 ways as a sum of consecutive naturals, for example, 6539 + ... + 13254.

It is an arithmetic number, because the mean of its divisors is an integer number (6591402).

Almost surely, 2^66464894 is an apocalyptic number.

66464894 is a deficient number, since it is larger than the sum of its proper divisors (38997538).

66464894 is a wasteful number, since it uses less digits than its factorization.

66464894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19891.

The product of its digits is 995328, while the sum is 47.

The square root of 66464894 is about 8152.6004440301. The cubic root of 66464894 is about 405.0706456045.

The spelling of 66464894 in words is "sixty-six million, four hundred sixty-four thousand, eight hundred ninety-four".