66683025 has 18 divisors (see below), whose sum is σ = 119437110. Its totient is φ = 35564160.

The previous prime is 66683017. The next prime is 66683047. The reversal of 66683025 is 52038666.

It can be written as a sum of positive squares in 3 ways, for example, as 5702544 + 60980481 = 2388^2 + 7809^2 .

It is not a de Polignac number, because 66683025 - 2³ = 66683017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 147960 + ... + 148409.

It is an arithmetic number, because the mean of its divisors is an integer number (6635395).

Almost surely, 2^66683025 is an apocalyptic number.

It is an amenable number.

66683025 is a deficient number, since it is larger than the sum of its proper divisors (52754085).

66683025 is a wasteful number, since it uses less digits than its factorization.

66683025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296385 (or 296377 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 66683025 is about 8165.9674870771. The cubic root of 66683025 is about 405.5132952219.

The spelling of 66683025 in words is "sixty-six million, six hundred eighty-three thousand, twenty-five".