65770421 has 2 divisors, whose sum is σ = 65770422. Its totient is φ = 65770420.

The previous prime is 65770391. The next prime is 65770451. The reversal of 65770421 is 12407756.

It is a balanced prime because it is at equal distance from previous prime (65770391) and next prime (65770451).

It can be written as a sum of positive squares in only one way, i.e., 64625521 + 1144900 = 8039^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 65770421 - 2⁶ = 65770357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65770451) 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, 32885210 + 32885211.

It is an arithmetic number, because the mean of its divisors is an integer number (32885211).

Almost surely, 2^65770421 is an apocalyptic number.

It is an amenable number.

65770421 is a deficient number, since it is larger than the sum of its proper divisors (1).

65770421 is an equidigital number, since it uses as much as digits as its factorization.

65770421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 65770421 is about 8109.8964851594. The cubic root of 65770421 is about 403.6548800004.

The spelling of 65770421 in words is "sixty-five million, seven hundred seventy thousand, four hundred twenty-one".