66534371 has 4 divisors (see below), whose sum is σ = 70036200. Its totient is φ = 63032544.

The previous prime is 66534367. The next prime is 66534383. The reversal of 66534371 is 17343566.

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

It is a cyclic number.

It is not a de Polignac number, because 66534371 - 2² = 66534367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66534301) 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, 1750886 + ... + 1750923.

It is an arithmetic number, because the mean of its divisors is an integer number (17509050).

Almost surely, 2^66534371 is an apocalyptic number.

66534371 is a deficient number, since it is larger than the sum of its proper divisors (3501829).

66534371 is a wasteful number, since it uses less digits than its factorization.

66534371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501828.

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

The square root of 66534371 is about 8156.8603641352. The cubic root of 66534371 is about 405.2117391005.

The spelling of 66534371 in words is "sixty-six million, five hundred thirty-four thousand, three hundred seventy-one".