3866016421 has 2 divisors, whose sum is σ = 3866016422. Its totient is φ = 3866016420.

The previous prime is 3866016367. The next prime is 3866016449. The reversal of 3866016421 is 1246106683.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3117993921 + 748022500 = 55839^2 + 27350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3866016421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3866086421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1933008210 + 1933008211.

It is an arithmetic number, because the mean of its divisors is an integer number (1933008211).

Almost surely, 2^3866016421 is an apocalyptic number.

It is an amenable number.

3866016421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3866016421 is an equidigital number, since it uses as much as digits as its factorization.

3866016421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 3866016421 is about 62177.2982767827. The cubic root of 3866016421 is about 1569.4755873604.

The spelling of 3866016421 in words is "three billion, eight hundred sixty-six million, sixteen thousand, four hundred twenty-one".