66268961 has 8 divisors (see below), whose sum is σ = 74247744. Its totient is φ = 58615920.

The previous prime is 66268931. The next prime is 66268967. The reversal of 66268961 is 16986266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66268961 - 2⁶ = 66268897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66268967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81005 + ... + 81818.

It is an arithmetic number, because the mean of its divisors is an integer number (9280968).

Almost surely, 2^66268961 is an apocalyptic number.

It is an amenable number.

66268961 is a deficient number, since it is larger than the sum of its proper divisors (7978783).

66268961 is a wasteful number, since it uses less digits than its factorization.

66268961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162871.

The product of its digits is 186624, while the sum is 44.

The square root of 66268961 is about 8140.5749796928. The cubic root of 66268961 is about 404.6722156022.

The spelling of 66268961 in words is "sixty-six million, two hundred sixty-eight thousand, nine hundred sixty-one".