999966430 has 16 divisors (see below), whose sum is σ = 1807115184. Its totient is φ = 398392000.

The previous prime is 999966427. The next prime is 999966439. The reversal of 999966430 is 34669999.

It is a super-2 number, since 2×999966430² = 1999865722253889800, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999966439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196687 + ... + 201706.

It is an arithmetic number, because the mean of its divisors is an integer number (112944699).

Almost surely, 2^999966430 is an apocalyptic number.

999966430 is a deficient number, since it is larger than the sum of its proper divisors (807148754).

999966430 is a wasteful number, since it uses less digits than its factorization.

999966430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398651.

The product of its (nonzero) digits is 2834352, while the sum is 55.

The square root of 999966430 is about 31622.2458089238. The cubic root of 999966430 is about 999.9888098748.

The spelling of 999966430 in words is "nine hundred ninety-nine million, nine hundred sixty-six thousand, four hundred thirty".