66291411 has 8 divisors (see below), whose sum is σ = 88455424. Its totient is φ = 44160840.

The previous prime is 66291409. The next prime is 66291413. The reversal of 66291411 is 11419266.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66291409) and next prime (66291413).

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

It is not a de Polignac number, because 66291411 - 2¹ = 66291409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66291413) 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, 3295 + ... + 11976.

It is an arithmetic number, because the mean of its divisors is an integer number (11056928).

Almost surely, 2^66291411 is an apocalyptic number.

66291411 is a deficient number, since it is larger than the sum of its proper divisors (22164013).

66291411 is a wasteful number, since it uses less digits than its factorization.

66291411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16721.

The product of its digits is 2592, while the sum is 30.

The square root of 66291411 is about 8141.9537581590. The cubic root of 66291411 is about 404.7179075088.

The spelling of 66291411 in words is "sixty-six million, two hundred ninety-one thousand, four hundred eleven".