66080961 has 16 divisors (see below), whose sum is σ = 99361600. Its totient is φ = 43395264.

The previous prime is 66080957. The next prime is 66081007. The reversal of 66080961 is 16908066.

It is not a de Polignac number, because 66080961 - 2² = 66080957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66080941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16456 + ... + 20073.

It is an arithmetic number, because the mean of its divisors is an integer number (6210100).

Almost surely, 2^66080961 is an apocalyptic number.

It is an amenable number.

66080961 is a deficient number, since it is larger than the sum of its proper divisors (33280639).

66080961 is a wasteful number, since it uses less digits than its factorization.

66080961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36605 (or 36599 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 66080961 is about 8129.0196825940. The cubic root of 66080961 is about 404.2891783962.

The spelling of 66080961 in words is "sixty-six million, eighty thousand, nine hundred sixty-one".