66057419 has 4 divisors (see below), whose sum is σ = 67462944. Its totient is φ = 64651896.

The previous prime is 66057391. The next prime is 66057421. The reversal of 66057419 is 91475066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66057419 is a prime.

It is a super-2 number, since 2×66057419² = 8727165209883122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66057479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702692 + ... + 702785.

It is an arithmetic number, because the mean of its divisors is an integer number (16865736).

Almost surely, 2^66057419 is an apocalyptic number.

66057419 is a deficient number, since it is larger than the sum of its proper divisors (1405525).

66057419 is a wasteful number, since it uses less digits than its factorization.

66057419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405524.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 66057419 is about 8127.5715315216. The cubic root of 66057419 is about 404.2411620126.

The spelling of 66057419 in words is "sixty-six million, fifty-seven thousand, four hundred nineteen".