50661000 has 192 divisors, whose sum is σ = 184831920. Its totient is φ = 12441600.

The previous prime is 50660993. The next prime is 50661007. The reversal of 50661000 is 16605.

50661000 is a `hidden beast` number, since 5 + 0 + 661 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (50660993) and next prime (50661007).

It can be written as a sum of positive squares in 8 ways, for example, as 2802276 + 47858724 = 1674^2 + 6918^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (50661007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116784 + ... + 117216.

Almost surely, 2^50661000 is an apocalyptic number.

50661000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50661000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92415960).

50661000 is an abundant number, since it is smaller than the sum of its proper divisors (134170920).

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

50661000 is a wasteful number, since it uses less digits than its factorization.

50661000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 50661000 is about 7117.6541079207. The cubic root of 50661000 is about 370.0194779130.

Adding to 50661000 its reverse (16605), we get a palindrome (50677605).

The spelling of 50661000 in words is "fifty million, six hundred sixty-one thousand".