66301656261 has 32 divisors (see below), whose sum is σ = 95461666560. Its totient is φ = 40806441984.

The previous prime is 66301656241. The next prime is 66301656263. The reversal of 66301656261 is 16265610366.

It is not a de Polignac number, because 66301656261 - 2⁷ = 66301656133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66301656263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8266125 + ... + 8274141.

It is an arithmetic number, because the mean of its divisors is an integer number (2983177080).

Almost surely, 2^66301656261 is an apocalyptic number.

It is an amenable number.

66301656261 is a deficient number, since it is larger than the sum of its proper divisors (29160010299).

66301656261 is a wasteful number, since it uses less digits than its factorization.

66301656261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12205.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 66301656261 in words is "sixty-six billion, three hundred one million, six hundred fifty-six thousand, two hundred sixty-one".