66937471 has 4 divisors (see below), whose sum is σ = 67529952. Its totient is φ = 66344992.

The previous prime is 66937459. The next prime is 66937501. The reversal of 66937471 is 17473966.

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 66937471 - 2⁵ = 66937439 is a prime.

It is a super-3 number, since 3×66937471³ (a number of 24 digits) contains 333 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 (66937571) 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, 296071 + ... + 296296.

It is an arithmetic number, because the mean of its divisors is an integer number (16882488).

Almost surely, 2^66937471 is an apocalyptic number.

66937471 is a deficient number, since it is larger than the sum of its proper divisors (592481).

66937471 is a wasteful number, since it uses less digits than its factorization.

66937471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592480.

The product of its digits is 190512, while the sum is 43.

The square root of 66937471 is about 8181.5323136928. The cubic root of 66937471 is about 406.0284201999.

The spelling of 66937471 in words is "sixty-six million, nine hundred thirty-seven thousand, four hundred seventy-one".