66441164 has 24 divisors (see below), whose sum is σ = 117821088. Its totient is φ = 32781440.

The previous prime is 66441143. The next prime is 66441173. The reversal of 66441164 is 46114466.

It is a self number, because there is not a number n which added to its sum of digits gives 66441164.

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, 143894 + ... + 144354.

It is an arithmetic number, because the mean of its divisors is an integer number (4909212).

Almost surely, 2^66441164 is an apocalyptic number.

It is an amenable number.

66441164 is a deficient number, since it is larger than the sum of its proper divisors (51379924).

66441164 is a wasteful number, since it uses less digits than its factorization.

66441164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 863 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 66441164 is about 8151.1449502509. The cubic root of 66441164 is about 405.0224323296.

The spelling of 66441164 in words is "sixty-six million, four hundred forty-one thousand, one hundred sixty-four".