66072025 has 18 divisors (see below), whose sum is σ = 86480142. Its totient is φ = 50068800.

The previous prime is 66072023. The next prime is 66072029. The reversal of 66072025 is 52027066.

It can be written as a sum of positive squares in 3 ways, for example, as 1172889 + 64899136 = 1083^2 + 8056^2 .

It is not a de Polignac number, because 66072025 - 2¹ = 66072023 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66071984 and 66072002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66072023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5365 + ... + 12685.

Almost surely, 2^66072025 is an apocalyptic number.

It is an amenable number.

66072025 is a deficient number, since it is larger than the sum of its proper divisors (20408117).

66072025 is a wasteful number, since it uses less digits than its factorization.

66072025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7369 (or 7345 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 66072025 is about 8128.4700282402. The cubic root of 66072025 is about 404.2709538279.

The spelling of 66072025 in words is "sixty-six million, seventy-two thousand, twenty-five".