50215666 has 4 divisors (see below), whose sum is σ = 75323502. Its totient is φ = 25107832.

The previous prime is 50215657. The next prime is 50215681. The reversal of 50215666 is 66651205.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66651205 = 5 ⋅13330241.

It can be written as a sum of positive squares in only one way, i.e., 34047225 + 16168441 = 5835^2 + 4021^2 .

It is a super-2 number, since 2×50215666² = 5043226223647112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12553915 + ... + 12553918.

Almost surely, 2^50215666 is an apocalyptic number.

50215666 is a deficient number, since it is larger than the sum of its proper divisors (25107836).

50215666 is a wasteful number, since it uses less digits than its factorization.

50215666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25107835.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 50215666 is about 7086.3012919294. The cubic root of 50215666 is about 368.9320703484.

The spelling of 50215666 in words is "fifty million, two hundred fifteen thousand, six hundred sixty-six".