50666815 has 8 divisors (see below), whose sum is σ = 63443808. Its totient is φ = 38771040.

The previous prime is 50666813. The next prime is 50666821. The reversal of 50666815 is 51866605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50666815 - 2¹ = 50666813 is a prime.

It is a super-2 number, since 2×50666815² = 5134252284488450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50666813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220176 + ... + 220405.

It is an arithmetic number, because the mean of its divisors is an integer number (7930476).

Almost surely, 2^50666815 is an apocalyptic number.

50666815 is a deficient number, since it is larger than the sum of its proper divisors (12776993).

50666815 is a wasteful number, since it uses less digits than its factorization.

50666815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440609.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 50666815 is about 7118.0625875304. The cubic root of 50666815 is about 370.0336346341.

It can be divided in two parts, 5066 and 6815, that added together give a square (11881 = 109²).

The spelling of 50666815 in words is "fifty million, six hundred sixty-six thousand, eight hundred fifteen".