66475250 has 64 divisors (see below), whose sum is σ = 131919840. Its totient is φ = 25043200.

The previous prime is 66475207. The next prime is 66475259. The reversal of 66475250 is 5257466.

It can be written as a sum of positive squares in 16 ways, for example, as 1560001 + 64915249 = 1249^2 + 8057^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66475250.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66475259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384164 + ... + 384336.

Almost surely, 2^66475250 is an apocalyptic number.

66475250 is a deficient number, since it is larger than the sum of its proper divisors (65444590).

66475250 is a wasteful number, since it uses less digits than its factorization.

66475250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 66475250 is about 8153.2355540607. The cubic root of 66475250 is about 405.0916827440.

The spelling of 66475250 in words is "sixty-six million, four hundred seventy-five thousand, two hundred fifty".