66503432 has 32 divisors (see below), whose sum is σ = 129388800. Its totient is φ = 32011200.

The previous prime is 66503429. The next prime is 66503461. The reversal of 66503432 is 23430566.

66503432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66503395 and 66503404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56207 + ... + 57377.

It is an arithmetic number, because the mean of its divisors is an integer number (4043400).

Almost surely, 2^66503432 is an apocalyptic number.

66503432 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66503432 is a deficient number, since it is larger than the sum of its proper divisors (62885368).

66503432 is a wasteful number, since it uses less digits than its factorization.

66503432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 66503432 is about 8154.9636418564. The cubic root of 66503432 is about 405.1489204923.

Adding to 66503432 its reverse (23430566), we get a palindrome (89933998).

The spelling of 66503432 in words is "sixty-six million, five hundred three thousand, four hundred thirty-two".