666075573 has 6 divisors (see below), whose sum is σ = 962109174. Its totient is φ = 444050376.

The previous prime is 666075499. The next prime is 666075661. The reversal of 666075573 is 375570666.

It can be written as a sum of positive squares in only one way, i.e., 413837649 + 252237924 = 20343^2 + 15882^2 .

It is not a de Polignac number, because 666075573 - 2¹² = 666071477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666075373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37004190 + ... + 37004207.

It is an arithmetic number, because the mean of its divisors is an integer number (160351529).

Almost surely, 2^666075573 is an apocalyptic number.

It is an amenable number.

666075573 is a deficient number, since it is larger than the sum of its proper divisors (296033601).

666075573 is a wasteful number, since it uses less digits than its factorization.

666075573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74008403 (or 74008400 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 45.

The square root of 666075573 is about 25808.4399567273. The cubic root of 666075573 is about 873.3222044532.

The spelling of 666075573 in words is "six hundred sixty-six million, seventy-five thousand, five hundred seventy-three".