66044961 has 12 divisors (see below), whose sum is σ = 95472000. Its totient is φ = 43995960.

The previous prime is 66044959. The next prime is 66044987. The reversal of 66044961 is 16944066.

66044961 is a `hidden beast` number, since 6 + 604 + 49 + 6 + 1 = 666.

It is not a de Polignac number, because 66044961 - 2¹ = 66044959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66044921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16156 + ... + 19826.

It is an arithmetic number, because the mean of its divisors is an integer number (7956000).

Almost surely, 2^66044961 is an apocalyptic number.

It is an amenable number.

66044961 is a deficient number, since it is larger than the sum of its proper divisors (29427039).

66044961 is a wasteful number, since it uses less digits than its factorization.

66044961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5676 (or 5673 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 66044961 is about 8126.8050917935. The cubic root of 66044961 is about 404.2157479960.

The spelling of 66044961 in words is "sixty-six million, forty-four thousand, nine hundred sixty-one".