66191367 has 8 divisors (see below), whose sum is σ = 96278400. Its totient is φ = 40115960.

The previous prime is 66191351. The next prime is 66191371. The reversal of 66191367 is 76319166.

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

It is a cyclic number.

It is not a de Polignac number, because 66191367 - 2⁴ = 66191351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66191317) 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, 1002867 + ... + 1002932.

It is an arithmetic number, because the mean of its divisors is an integer number (12034800).

Almost surely, 2^66191367 is an apocalyptic number.

66191367 is a deficient number, since it is larger than the sum of its proper divisors (30087033).

66191367 is a wasteful number, since it uses less digits than its factorization.

66191367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005813.

The product of its digits is 40824, while the sum is 39.

The square root of 66191367 is about 8135.8077042172. The cubic root of 66191367 is about 404.5142110159.

The spelling of 66191367 in words is "sixty-six million, one hundred ninety-one thousand, three hundred sixty-seven".