65620049 has 16 divisors (see below), whose sum is σ = 74257344. Its totient is φ = 57465600.

The previous prime is 65620043. The next prime is 65620063. The reversal of 65620049 is 94002656.

It is not a de Polignac number, because 65620049 - 2⁸ = 65619793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65619997 and 65620024.

It is not an unprimeable number, because it can be changed into a prime (65620043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36557 + ... + 38309.

It is an arithmetic number, because the mean of its divisors is an integer number (4641084).

Almost surely, 2^65620049 is an apocalyptic number.

It is an amenable number.

65620049 is a deficient number, since it is larger than the sum of its proper divisors (8637295).

65620049 is a wasteful number, since it uses less digits than its factorization.

65620049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65620049 is about 8100.6202848918. The cubic root of 65620049 is about 403.3470176507.

The spelling of 65620049 in words is "sixty-five million, six hundred twenty thousand, forty-nine".