50666665 has 16 divisors (see below), whose sum is σ = 70467840. Its totient is φ = 34251840.

The previous prime is 50666657. The next prime is 50666669. The reversal of 50666665 is 56666605.

It is a happy number.

It is not a de Polignac number, because 50666665 - 2³ = 50666657 is a prime.

It is a super-2 number, since 2×50666665² = 5134221884444450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50666669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7710 + ... + 12679.

It is an arithmetic number, because the mean of its divisors is an integer number (4404240).

Almost surely, 2^50666665 is an apocalyptic number.

It is an amenable number.

50666665 is a deficient number, since it is larger than the sum of its proper divisors (19801175).

50666665 is a wasteful number, since it uses less digits than its factorization.

50666665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20472.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 50666665 is about 7118.0520509476. The cubic root of 50666665 is about 370.0332694701.

The spelling of 50666665 in words is "fifty million, six hundred sixty-six thousand, six hundred sixty-five".