66522456 has 288 divisors, whose sum is σ = 246654720. Its totient is φ = 15724800.

The previous prime is 66522413. The next prime is 66522457. The reversal of 66522456 is 65422566.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 66522456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66522457) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 936901 + ... + 936971.

It is an arithmetic number, because the mean of its divisors is an integer number (856440).

Almost surely, 2^66522456 is an apocalyptic number.

66522456 is a gapful number since it is divisible by the number (66) 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 66522456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123327360).

66522456 is an abundant number, since it is smaller than the sum of its proper divisors (180132264).

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

66522456 is a wasteful number, since it uses less digits than its factorization.

66522456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 107 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 66522456 is about 8156.1299646340. The cubic root of 66522456 is about 405.1875491666.

The spelling of 66522456 in words is "sixty-six million, five hundred twenty-two thousand, four hundred fifty-six".