66000291 has 16 divisors (see below), whose sum is σ = 102278400. Its totient is φ = 37074528.

The previous prime is 66000287. The next prime is 66000299. The reversal of 66000291 is 19200066.

It is not a de Polignac number, because 66000291 - 2² = 66000287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66000299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25396 + ... + 27873.

It is an arithmetic number, because the mean of its divisors is an integer number (6392400).

Almost surely, 2^66000291 is an apocalyptic number.

66000291 is a deficient number, since it is larger than the sum of its proper divisors (36278109).

66000291 is a wasteful number, since it uses less digits than its factorization.

66000291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53338.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 66000291 is about 8124.0563144282. The cubic root of 66000291 is about 404.1245960012.

The spelling of 66000291 in words is "sixty-six million, two hundred ninety-one", and thus it is an aban number.