66112440 has 32 divisors (see below), whose sum is σ = 198337680. Its totient is φ = 17629952.

The previous prime is 66112433. The next prime is 66112441. The reversal of 66112440 is 4421166.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 66112440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66112441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275349 + ... + 275588.

Almost surely, 2^66112440 is an apocalyptic number.

66112440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66112440 is an abundant number, since it is smaller than the sum of its proper divisors (132225240).

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

66112440 is a wasteful number, since it uses less digits than its factorization.

66112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550951 (or 550947 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 66112440 is about 8130.9556633891. The cubic root of 66112440 is about 404.3533653094.

The spelling of 66112440 in words is "sixty-six million, one hundred twelve thousand, four hundred forty".