555161665 has 16 divisors (see below), whose sum is σ = 711731520. Its totient is φ = 414469440.

The previous prime is 555161647. The next prime is 555161681. The reversal of 555161665 is 566161555.

It is a de Polignac number, because none of the positive numbers 2^k-555161665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37246 + ... + 49975.

It is an arithmetic number, because the mean of its divisors is an integer number (44483220).

Almost surely, 2^555161665 is an apocalyptic number.

It is an amenable number.

555161665 is a deficient number, since it is larger than the sum of its proper divisors (156569855).

555161665 is a wasteful number, since it uses less digits than its factorization.

555161665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87312.

The product of its digits is 135000, while the sum is 40.

The square root of 555161665 is about 23561.8688774893. The cubic root of 555161665 is about 821.8763619807.

The spelling of 555161665 in words is "five hundred fifty-five million, one hundred sixty-one thousand, six hundred sixty-five".