65720576 has 18 divisors (see below), whose sum is σ = 131184942. Its totient is φ = 32860160.

The previous prime is 65720549. The next prime is 65720587. The reversal of 65720576 is 67502756.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 24760576 = 6400^2 + 4976^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128105 + ... + 128616.

Almost surely, 2^65720576 is an apocalyptic number.

It is an amenable number.

65720576 is a deficient number, since it is larger than the sum of its proper divisors (65464366).

65720576 is an equidigital number, since it uses as much as digits as its factorization.

65720576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256737 (or 256723 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 65720576 is about 8106.8228055139. The cubic root of 65720576 is about 403.5528824656.

The spelling of 65720576 in words is "sixty-five million, seven hundred twenty thousand, five hundred seventy-six".