65729012 has 6 divisors (see below), whose sum is σ = 115025778. Its totient is φ = 32864504.

The previous prime is 65729011. The next prime is 65729017. The reversal of 65729012 is 21092756.

It can be written as a sum of positive squares in only one way, i.e., 43507216 + 22221796 = 6596^2 + 4714^2 .

It is a super-2 number, since 2×65729012² = 8640606036992288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65729012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65729011) 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 as a sum of consecutive naturals, namely, 8216123 + ... + 8216130.

It is an arithmetic number, because the mean of its divisors is an integer number (19170963).

Almost surely, 2^65729012 is an apocalyptic number.

It is an amenable number.

65729012 is a deficient number, since it is larger than the sum of its proper divisors (49296766).

65729012 is a wasteful number, since it uses less digits than its factorization.

65729012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16432257 (or 16432255 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 65729012 is about 8107.3430912969. The cubic root of 65729012 is about 403.5701486282.

The spelling of 65729012 in words is "sixty-five million, seven hundred twenty-nine thousand, twelve".