66343571 has 16 divisors (see below), whose sum is σ = 80547840. Its totient is φ = 53343360.

The previous prime is 66343549. The next prime is 66343577. The reversal of 66343571 is 17534366.

It is a de Polignac number, because none of the positive numbers 2^k-66343571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66343577) 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, 44366 + ... + 45836.

It is an arithmetic number, because the mean of its divisors is an integer number (5034240).

Almost surely, 2^66343571 is an apocalyptic number.

66343571 is a deficient number, since it is larger than the sum of its proper divisors (14204269).

66343571 is a wasteful number, since it uses less digits than its factorization.

66343571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874.

The product of its digits is 45360, while the sum is 35.

The square root of 66343571 is about 8145.1562907043. The cubic root of 66343571 is about 404.8240276003.

The spelling of 66343571 in words is "sixty-six million, three hundred forty-three thousand, five hundred seventy-one".