66675025 has 12 divisors (see below), whose sum is σ = 83030400. Its totient is φ = 53112080.

The previous prime is 66675001. The next prime is 66675029. The reversal of 66675025 is 52057666.

It is not a de Polignac number, because 66675025 - 2⁹ = 66674513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66675029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396 + ... + 11554.

It is an arithmetic number, because the mean of its divisors is an integer number (6919200).

Almost surely, 2^66675025 is an apocalyptic number.

It is an amenable number.

66675025 is a deficient number, since it is larger than the sum of its proper divisors (16355375).

66675025 is a wasteful number, since it uses less digits than its factorization.

66675025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11408 (or 11403 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 66675025 is about 8165.4776345294. The cubic root of 66675025 is about 405.4970780206.

The spelling of 66675025 in words is "sixty-six million, six hundred seventy-five thousand, twenty-five".