265557066 has 32 divisors (see below), whose sum is σ = 546652800. Its totient is φ = 85939776.

The previous prime is 265557059. The next prime is 265557073. The reversal of 265557066 is 660755562.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (265557059) and next prime (265557073).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131980 + ... + 133976.

It is an arithmetic number, because the mean of its divisors is an integer number (17082900).

Almost surely, 2^265557066 is an apocalyptic number.

265557066 is an abundant number, since it is smaller than the sum of its proper divisors (281095734).

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

265557066 is a wasteful number, since it uses less digits than its factorization.

265557066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638.

The product of its (nonzero) digits is 378000, while the sum is 42.

The square root of 265557066 is about 16295.9217597533. The cubic root of 265557066 is about 642.7655922255.

The spelling of 265557066 in words is "two hundred sixty-five million, five hundred fifty-seven thousand, sixty-six".