550423665 has 24 divisors (see below), whose sum is σ = 1040802048. Its totient is φ = 266871840.

The previous prime is 550423633. The next prime is 550423681. The reversal of 550423665 is 566324055.

It is a happy number.

550423665 is a `hidden beast` number, since 550 + 42 + 3 + 6 + 65 = 666.

It is not a de Polignac number, because 550423665 - 2⁵ = 550423633 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555489 + ... + 556478.

It is an arithmetic number, because the mean of its divisors is an integer number (43366752).

Almost surely, 2^550423665 is an apocalyptic number.

550423665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

550423665 is a deficient number, since it is larger than the sum of its proper divisors (490378383).

550423665 is a wasteful number, since it uses less digits than its factorization.

550423665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111989 (or 1111986 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 550423665 is about 23461.1096284894. The cubic root of 550423665 is about 819.5315909982.

The spelling of 550423665 in words is "five hundred fifty million, four hundred twenty-three thousand, six hundred sixty-five".