53109966 has 64 divisors (see below), whose sum is σ = 131636736. Its totient is φ = 13910400.

The previous prime is 53109937. The next prime is 53109977. The reversal of 53109966 is 66990135.

53109966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114976 + ... + 115436.

It is an arithmetic number, because the mean of its divisors is an integer number (2056824).

Almost surely, 2^53109966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53109966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65818368).

53109966 is an abundant number, since it is smaller than the sum of its proper divisors (78526770).

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

53109966 is a wasteful number, since it uses less digits than its factorization.

53109966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 53109966 is about 7287.6584716903. The cubic root of 53109966 is about 375.8881844593. Note that the first 3 decimals are identical.

The spelling of 53109966 in words is "fifty-three million, one hundred nine thousand, nine hundred sixty-six".