506866815 has 160 divisors (see below), whose sum is σ = 1185528960. Its totient is φ = 201056256.

The previous prime is 506866793. The next prime is 506866861. The reversal of 506866815 is 518668605.

506866815 is a `hidden beast` number, since 506 + 8 + 66 + 81 + 5 = 666.

It is not a de Polignac number, because 506866815 - 2¹³ = 506858623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 626131 + ... + 626939.

It is an arithmetic number, because the mean of its divisors is an integer number (7409556).

Almost surely, 2^506866815 is an apocalyptic number.

506866815 is an abundant number, since it is smaller than the sum of its proper divisors (678662145).

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

506866815 is a wasteful number, since it uses less digits than its factorization.

506866815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 506866815 is about 22513.7028273894. The cubic root of 506866815 is about 797.3174813164.

The spelling of 506866815 in words is "five hundred six million, eight hundred sixty-six thousand, eight hundred fifteen".