66201261 has 8 divisors (see below), whose sum is σ = 100878144. Its totient is φ = 37829280.

The previous prime is 66201257. The next prime is 66201307. The reversal of 66201261 is 16210266.

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

It is not a de Polignac number, because 66201261 - 2² = 66201257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66201361) 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, 1576200 + ... + 1576241.

It is an arithmetic number, because the mean of its divisors is an integer number (12609768).

Almost surely, 2^66201261 is an apocalyptic number.

It is an amenable number.

66201261 is a deficient number, since it is larger than the sum of its proper divisors (34676883).

66201261 is a wasteful number, since it uses less digits than its factorization.

66201261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152451.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 66201261 is about 8136.4157342161. The cubic root of 66201261 is about 404.5343650248.

The spelling of 66201261 in words is "sixty-six million, two hundred one thousand, two hundred sixty-one".