660803055 has 16 divisors (see below), whose sum is σ = 1153401984. Its totient is φ = 320389280.

The previous prime is 660803047. The next prime is 660803069. The reversal of 660803055 is 550308066.

It is not a de Polignac number, because 660803055 - 2³ = 660803047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 2002269 + ... + 2002598.

It is an arithmetic number, because the mean of its divisors is an integer number (72087624).

Almost surely, 2^660803055 is an apocalyptic number.

660803055 is a deficient number, since it is larger than the sum of its proper divisors (492598929).

660803055 is a wasteful number, since it uses less digits than its factorization.

660803055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004886.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 660803055 is about 25706.0898426812. The cubic root of 660803055 is about 871.0117506784.

Adding to 660803055 its reverse (550308066), we get a palindrome (1211111121).

The spelling of 660803055 in words is "six hundred sixty million, eight hundred three thousand, fifty-five".