64780133 has 12 divisors (see below), whose sum is σ = 71602944. Its totient is φ = 58561800.

The previous prime is 64780129. The next prime is 64780141. The reversal of 64780133 is 33108746.

It is not a de Polignac number, because 64780133 - 2² = 64780129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64780133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64780193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21710 + ... + 24512.

It is an arithmetic number, because the mean of its divisors is an integer number (5966912).

Almost surely, 2^64780133 is an apocalyptic number.

It is an amenable number.

64780133 is a deficient number, since it is larger than the sum of its proper divisors (6822811).

64780133 is a wasteful number, since it uses less digits than its factorization.

64780133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016 (or 3005 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 64780133 is about 8048.6106254434. The cubic root of 64780133 is about 401.6187176301.

Adding to 64780133 its reverse (33108746), we get a palindrome (97888879).

The spelling of 64780133 in words is "sixty-four million, seven hundred eighty thousand, one hundred thirty-three".