605542665 has 128 divisors (see below), whose sum is σ = 1241210880. Its totient is φ = 245348352.

The previous prime is 605542661. The next prime is 605542667. The reversal of 605542665 is 566245506.

It is a happy number.

It is not a de Polignac number, because 605542665 - 2² = 605542661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (605542661) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 5879004 + ... + 5879106.

It is an arithmetic number, because the mean of its divisors is an integer number (9696960).

Almost surely, 2^605542665 is an apocalyptic number.

605542665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

605542665 is an abundant number, since it is smaller than the sum of its proper divisors (635668215).

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

605542665 is a wasteful number, since it uses less digits than its factorization.

605542665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263.

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 605542665 is about 24607.7765147524. The cubic root of 605542665 is about 846.0218558700.

The spelling of 605542665 in words is "six hundred five million, five hundred forty-two thousand, six hundred sixty-five".