65405072 has 20 divisors (see below), whose sum is σ = 127460220. Its totient is φ = 32512128.

The previous prime is 65405057. The next prime is 65405117. The reversal of 65405072 is 27050456.

It can be written as a sum of positive squares in 2 ways, for example, as 26666896 + 38738176 = 5164^2 + 6224^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9047 + ... + 14582.

It is an arithmetic number, because the mean of its divisors is an integer number (6373011).

Almost surely, 2^65405072 is an apocalyptic number.

It is an amenable number.

65405072 is a deficient number, since it is larger than the sum of its proper divisors (62055148).

65405072 is a wasteful number, since it uses less digits than its factorization.

65405072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23810 (or 23804 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 65405072 is about 8087.3402302611. The cubic root of 65405072 is about 402.9060691091.

The spelling of 65405072 in words is "sixty-five million, four hundred five thousand, seventy-two".