66362971 has 4 divisors (see below), whose sum is σ = 68503744. Its totient is φ = 64222200.

The previous prime is 66362921. The next prime is 66362977. The reversal of 66362971 is 17926366.

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 66362971 - 2¹¹ = 66360923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66362977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070340 + ... + 1070401.

It is an arithmetic number, because the mean of its divisors is an integer number (17125936).

Almost surely, 2^66362971 is an apocalyptic number.

66362971 is a deficient number, since it is larger than the sum of its proper divisors (2140773).

66362971 is a wasteful number, since it uses less digits than its factorization.

66362971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140772.

The product of its digits is 81648, while the sum is 40.

The square root of 66362971 is about 8146.3470954778. The cubic root of 66362971 is about 404.8634829217.

The spelling of 66362971 in words is "sixty-six million, three hundred sixty-two thousand, nine hundred seventy-one".