65622649 has 2 divisors, whose sum is σ = 65622650. Its totient is φ = 65622648.

The previous prime is 65622643. The next prime is 65622671. The reversal of 65622649 is 94622656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62916624 + 2706025 = 7932^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 65622649 - 2⁵ = 65622617 is a prime.

It is not a weakly prime, because it can be changed into another prime (65622643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32811324 + 32811325.

It is an arithmetic number, because the mean of its divisors is an integer number (32811325).

Almost surely, 2^65622649 is an apocalyptic number.

It is an amenable number.

65622649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65622649 is an equidigital number, since it uses as much as digits as its factorization.

65622649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 65622649 is about 8100.7807648399. The cubic root of 65622649 is about 403.3523447239.

The spelling of 65622649 in words is "sixty-five million, six hundred twenty-two thousand, six hundred forty-nine".