66134719 has 8 divisors (see below), whose sum is σ = 76252320. Its totient is φ = 56184576.

The previous prime is 66134713. The next prime is 66134737. The reversal of 66134719 is 91743166.

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

It is not a de Polignac number, because 66134719 - 2³ = 66134711 is a prime.

It is a super-2 number, since 2×66134719² = 8747602114417922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66134711) 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, 41014 + ... + 42595.

It is an arithmetic number, because the mean of its divisors is an integer number (9531540).

Almost surely, 2^66134719 is an apocalyptic number.

66134719 is a deficient number, since it is larger than the sum of its proper divisors (10117601).

66134719 is a wasteful number, since it uses less digits than its factorization.

66134719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83729.

The product of its digits is 27216, while the sum is 37.

The square root of 66134719 is about 8132.3255591497. The cubic root of 66134719 is about 404.3987807506.

The spelling of 66134719 in words is "sixty-six million, one hundred thirty-four thousand, seven hundred nineteen".