66025049 has 4 divisors (see below), whose sum is σ = 66084660. Its totient is φ = 65965440.

The previous prime is 66025039. The next prime is 66025061. The reversal of 66025049 is 94052066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94052066 = 2 ⋅47026033.

It can be written as a sum of positive squares in 2 ways, for example, as 37295449 + 28729600 = 6107^2 + 5360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66025049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66025039) 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, 28112 + ... + 30369.

It is an arithmetic number, because the mean of its divisors is an integer number (16521165).

Almost surely, 2^66025049 is an apocalyptic number.

It is an amenable number.

66025049 is a deficient number, since it is larger than the sum of its proper divisors (59611).

66025049 is a wasteful number, since it uses less digits than its factorization.

66025049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59610.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66025049 is about 8125.5799177659. The cubic root of 66025049 is about 404.1751213640.

The spelling of 66025049 in words is "sixty-six million, twenty-five thousand, forty-nine".