1335666421 has 4 divisors (see below), whose sum is σ = 1414235052. Its totient is φ = 1257097792.

The previous prime is 1335666401. The next prime is 1335666457. The reversal of 1335666421 is 1246665331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1246665331 = 43 ⋅28992217.

It can be written as a sum of positive squares in 2 ways, for example, as 1088076196 + 247590225 = 32986^2 + 15735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1335666421 - 2¹¹ = 1335664373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1335666401) 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 in 3 ways as a sum of consecutive naturals, for example, 39284290 + ... + 39284323.

It is an arithmetic number, because the mean of its divisors is an integer number (353558763).

Almost surely, 2^1335666421 is an apocalyptic number.

It is an amenable number.

1335666421 is a deficient number, since it is larger than the sum of its proper divisors (78568631).

1335666421 is an equidigital number, since it uses as much as digits as its factorization.

1335666421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78568630.

The product of its digits is 77760, while the sum is 37.

The square root of 1335666421 is about 36546.7703224238. The cubic root of 1335666421 is about 1101.2840160282.

The spelling of 1335666421 in words is "one billion, three hundred thirty-five million, six hundred sixty-six thousand, four hundred twenty-one".