66873025 has 6 divisors (see below), whose sum is σ = 82922582. Its totient is φ = 53498400.

The previous prime is 66873013. The next prime is 66873031. The reversal of 66873025 is 52037866.

It can be written as a sum of positive squares in 3 ways, for example, as 11861136 + 55011889 = 3444^2 + 7417^2 .

It is not a de Polignac number, because 66873025 - 2¹⁷ = 66741953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1337436 + ... + 1337485.

Almost surely, 2^66873025 is an apocalyptic number.

It is an amenable number.

66873025 is a deficient number, since it is larger than the sum of its proper divisors (16049557).

66873025 is a wasteful number, since it uses less digits than its factorization.

66873025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674931 (or 2674926 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 66873025 is about 8177.5928609830. The cubic root of 66873025 is about 405.8980731296.

The spelling of 66873025 in words is "sixty-six million, eight hundred seventy-three thousand, twenty-five".