50066991 has 36 divisors (see below), whose sum is σ = 81011112. Its totient is φ = 30757968.

The previous prime is 50066981. The next prime is 50067001. The reversal of 50066991 is 19966005.

50066991 is a `hidden beast` number, since 500 + 6 + 69 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (50066981) and next prime (50067001).

It is not a de Polignac number, because 50066991 - 2¹⁸ = 49804847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50066911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85000 + ... + 85586.

Almost surely, 2^50066991 is an apocalyptic number.

50066991 is a deficient number, since it is larger than the sum of its proper divisors (30944121).

50066991 is an frugal number, since it uses more digits than its factorization.

50066991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 50066991 is about 7075.8032052905. The cubic root of 50066991 is about 368.5676077407.

The spelling of 50066991 in words is "fifty million, sixty-six thousand, nine hundred ninety-one".