2066430257 has 4 divisors (see below), whose sum is σ = 2187984996. Its totient is φ = 1944875520.

The previous prime is 2066430211. The next prime is 2066430263. The reversal of 2066430257 is 7520346602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1939169296 + 127260961 = 44036^2 + 11281^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066430257 - 2¹² = 2066426161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066450257) 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 in 3 ways as a sum of consecutive naturals, for example, 60777344 + ... + 60777377.

It is an arithmetic number, because the mean of its divisors is an integer number (546996249).

Almost surely, 2^2066430257 is an apocalyptic number.

It is an amenable number.

2066430257 is a deficient number, since it is larger than the sum of its proper divisors (121554739).

2066430257 is a wasteful number, since it uses less digits than its factorization.

2066430257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121554738.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 2066430257 is about 45458.0054225876. The cubic root of 2066430257 is about 1273.7188734973.

Adding to 2066430257 its reverse (7520346602), we get a palindrome (9586776859).

The spelling of 2066430257 in words is "two billion, sixty-six million, four hundred thirty thousand, two hundred fifty-seven".