66950520 has 128 divisors (see below), whose sum is σ = 247242240. Its totient is φ = 14123520.

The previous prime is 66950519. The next prime is 66950537. The reversal of 66950520 is 2505966.

It is a congruent 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 in 31 ways as a sum of consecutive naturals, for example, 7855 + ... + 13985.

It is an arithmetic number, because the mean of its divisors is an integer number (1931580).

Almost surely, 2^66950520 is an apocalyptic number.

66950520 is a gapful number since it is divisible by the number (60) 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 66950520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123621120).

66950520 is an abundant number, since it is smaller than the sum of its proper divisors (180291720).

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

66950520 is a wasteful number, since it uses less digits than its factorization.

66950520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6165 (or 6161 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 66950520 is about 8182.3297415834. The cubic root of 66950520 is about 406.0548026357.

The spelling of 66950520 in words is "sixty-six million, nine hundred fifty thousand, five hundred twenty".