275640066 has 24 divisors (see below), whose sum is σ = 643160700. Its totient is φ = 84812256.

The previous prime is 275640037. The next prime is 275640107. The reversal of 275640066 is 660046572.

275640066 is a `hidden beast` number, since 2 + 7 + 5 + 640 + 0 + 6 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 271755225 + 3884841 = 16485^2 + 1971^2 .

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 275640066.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 588741 + ... + 589208.

Almost surely, 2^275640066 is an apocalyptic number.

275640066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

275640066 is an abundant number, since it is smaller than the sum of its proper divisors (367520634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

275640066 is a wasteful number, since it uses less digits than its factorization.

275640066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177970 (or 1177967 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 275640066 is about 16602.4114513525. The cubic root of 275640066 is about 650.7998563601.

The spelling of 275640066 in words is "two hundred seventy-five million, six hundred forty thousand, sixty-six".