66957449 has 8 divisors (see below), whose sum is σ = 72313920. Its totient is φ = 61630416.

The previous prime is 66957437. The next prime is 66957479. The reversal of 66957449 is 94475966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66957449 - 2⁸ = 66957193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66957397 and 66957406.

It is not an unprimeable number, because it can be changed into a prime (66957479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2507 + ... + 11840.

It is an arithmetic number, because the mean of its divisors is an integer number (9039240).

Almost surely, 2^66957449 is an apocalyptic number.

It is an amenable number.

66957449 is a deficient number, since it is larger than the sum of its proper divisors (5356471).

66957449 is a wasteful number, since it uses less digits than its factorization.

66957449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14719.

The product of its digits is 1632960, while the sum is 50.

The square root of 66957449 is about 8182.7531430442. The cubic root of 66957449 is about 406.0688102773.

The spelling of 66957449 in words is "sixty-six million, nine hundred fifty-seven thousand, four hundred forty-nine".