265166740 has 24 divisors (see below), whose sum is σ = 563562720. Its totient is φ = 104788128.

The previous prime is 265166719. The next prime is 265166743. The reversal of 265166740 is 47661562.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 265166740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265166743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78210 + ... + 81529.

It is an arithmetic number, because the mean of its divisors is an integer number (23481780).

Almost surely, 2^265166740 is an apocalyptic number.

265166740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265166740 is an abundant number, since it is smaller than the sum of its proper divisors (298395980).

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

265166740 is a wasteful number, since it uses less digits than its factorization.

265166740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159831 (or 159829 counting only the distinct ones).

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

The square root of 265166740 is about 16283.9411691396. The cubic root of 265166740 is about 642.4505172669.

The spelling of 265166740 in words is "two hundred sixty-five million, one hundred sixty-six thousand, seven hundred forty".