66534336 has 84 divisors (see below), whose sum is σ = 208065624. Its totient is φ = 20160000.

The previous prime is 66534301. The next prime is 66534341. The reversal of 66534336 is 63343566.

It is a happy number.

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 66534336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1086 + ... + 11586.

Almost surely, 2^66534336 is an apocalyptic number.

66534336 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 66534336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104032812).

66534336 is an abundant number, since it is smaller than the sum of its proper divisors (141531288).

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

66534336 is a wasteful number, since it uses less digits than its factorization.

66534336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10530 (or 10517 counting only the distinct ones).

The product of its digits is 116640, while the sum is 36.

The square root of 66534336 is about 8156.8582187016. The cubic root of 66534336 is about 405.2116680474.

The spelling of 66534336 in words is "sixty-six million, five hundred thirty-four thousand, three hundred thirty-six".