66535340 has 48 divisors (see below), whose sum is σ = 147813120. Its totient is φ = 25087680.

The previous prime is 66535327. The next prime is 66535363. The reversal of 66535340 is 4353566.

It is a junction number, because it is equal to n+sod(n) for n = 66535297 and 66535306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117899 + ... + 118461.

It is an arithmetic number, because the mean of its divisors is an integer number (3079440).

Almost surely, 2^66535340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66535340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73906560).

66535340 is an abundant number, since it is smaller than the sum of its proper divisors (81277780).

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

66535340 is a wasteful number, since it uses less digits than its factorization.

66535340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 66535340 is about 8156.9197617728. The cubic root of 66535340 is about 405.2137062455.

The spelling of 66535340 in words is "sixty-six million, five hundred thirty-five thousand, three hundred forty".