66374849 has 4 divisors (see below), whose sum is σ = 69260736. Its totient is φ = 63488964.

The previous prime is 66374839. The next prime is 66374873. The reversal of 66374849 is 94847366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94847366 = 2 ⋅47423683.

It is a cyclic number.

It is not a de Polignac number, because 66374849 - 2¹² = 66370753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66374839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442909 + ... + 1442954.

It is an arithmetic number, because the mean of its divisors is an integer number (17315184).

Almost surely, 2^66374849 is an apocalyptic number.

It is an amenable number.

66374849 is a deficient number, since it is larger than the sum of its proper divisors (2885887).

66374849 is a wasteful number, since it uses less digits than its factorization.

66374849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885886.

The product of its digits is 870912, while the sum is 47.

The square root of 66374849 is about 8147.0761012771. The cubic root of 66374849 is about 404.8876363589.

The spelling of 66374849 in words is "sixty-six million, three hundred seventy-four thousand, eight hundred forty-nine".