50660640 has 144 divisors (see below), whose sum is σ = 179419968. Its totient is φ = 13499136.

The previous prime is 50660639. The next prime is 50660641. The reversal of 50660640 is 4606605.

50660640 is a `hidden beast` number, since 50 + 6 + 606 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (50660639) and next prime (50660641).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (50660641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38229 + ... + 39531.

It is an arithmetic number, because the mean of its divisors is an integer number (1245972).

Almost surely, 2^50660640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50660640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89709984).

50660640 is an abundant number, since it is smaller than the sum of its proper divisors (128759328).

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

50660640 is a wasteful number, since it uses less digits than its factorization.

50660640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 50660640 is about 7117.6288186446. The cubic root of 50660640 is about 370.0186014510.

The spelling of 50660640 in words is "fifty million, six hundred sixty thousand, six hundred forty".