66503536 has 30 divisors (see below), whose sum is σ = 141633296. Its totient is φ = 30228000.

The previous prime is 66503533. The next prime is 66503537. The reversal of 66503536 is 63530566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66503533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15240 + ... + 19111.

Almost surely, 2^66503536 is an apocalyptic number.

It is an amenable number.

66503536 is an abundant number, since it is smaller than the sum of its proper divisors (75129760).

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

66503536 is a wasteful number, since it uses less digits than its factorization.

66503536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34381 (or 34364 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 34.

The square root of 66503536 is about 8154.9700183385. The cubic root of 66503536 is about 405.1491316868.

The spelling of 66503536 in words is "sixty-six million, five hundred three thousand, five hundred thirty-six".