66937449 has 16 divisors (see below), whose sum is σ = 94886208. Its totient is φ = 41828352.

The previous prime is 66937439. The next prime is 66937457. The reversal of 66937449 is 94473966.

It is not a de Polignac number, because 66937449 - 2¹² = 66933353 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66937398 and 66937407.

It is not an unprimeable number, because it can be changed into a prime (66937439) 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, 10554 + ... + 15660.

It is an arithmetic number, because the mean of its divisors is an integer number (5930388).

Almost surely, 2^66937449 is an apocalyptic number.

It is an amenable number.

66937449 is a deficient number, since it is larger than the sum of its proper divisors (27948759).

66937449 is a wasteful number, since it uses less digits than its factorization.

66937449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5384.

The product of its digits is 979776, while the sum is 48.

The square root of 66937449 is about 8181.5309692013. The cubic root of 66937449 is about 406.0283757174.

The spelling of 66937449 in words is "sixty-six million, nine hundred thirty-seven thousand, four hundred forty-nine".