1165665004 has 24 divisors (see below), whose sum is σ = 2344815648. Its totient is φ = 496680960.

The previous prime is 1165664989. The next prime is 1165665019. The reversal of 1165665004 is 4005665611.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1165664989) and next prime (1165665019).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115477 + ... + 125164.

It is an arithmetic number, because the mean of its divisors is an integer number (97700652).

Almost surely, 2^1165665004 is an apocalyptic number.

1165665004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1165665004 is an abundant number, since it is smaller than the sum of its proper divisors (1179150644).

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

1165665004 is a wasteful number, since it uses less digits than its factorization.

1165665004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240825 (or 240823 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1165665004 is about 34141.8365645435. The cubic root of 1165665004 is about 1052.4252342217.

The spelling of 1165665004 in words is "one billion, one hundred sixty-five million, six hundred sixty-five thousand, four".