203430010066 has 4 divisors (see below), whose sum is σ = 305145015102. Its totient is φ = 101715005032.

The previous prime is 203430010019. The next prime is 203430010067. The reversal of 203430010066 is 660010034302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660010034302 = 2 ⋅330005017151.

It can be written as a sum of positive squares in only one way, i.e., 186706089025 + 16723921041 = 432095^2 + 129321^2 .

It is a super-2 number, since 2×203430010066² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203430010066.

It is not an unprimeable number, because it can be changed into a prime (203430010067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50857502515 + ... + 50857502518.

Almost surely, 2^203430010066 is an apocalyptic number.

203430010066 is a deficient number, since it is larger than the sum of its proper divisors (101715005036).

203430010066 is a wasteful number, since it uses less digits than its factorization.

203430010066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101715005035.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 203430010066 its reverse (660010034302), we get a palindrome (863440044368).

The spelling of 203430010066 in words is "two hundred three billion, four hundred thirty million, ten thousand, sixty-six".