9996699666 has 16 divisors (see below), whose sum is σ = 19997001504. Its totient is φ = 3331632864.

The previous prime is 9996699613. The next prime is 9996699667. The reversal of 9996699666 is 6669966999.

9996699666 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9996699667) 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, 113320 + ... + 181203.

It is an arithmetic number, because the mean of its divisors is an integer number (1249812594).

Almost surely, 2^9996699666 is an apocalyptic number.

9996699666 is an abundant number, since it is smaller than the sum of its proper divisors (10000301838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9996699666 is a wasteful number, since it uses less digits than its factorization.

9996699666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300185.

The product of its digits is 459165024, while the sum is 75.

The square root of 9996699666 is about 99983.4969682497. The cubic root of 9996699666 is about 2154.1976521512.

The spelling of 9996699666 in words is "nine billion, nine hundred ninety-six million, six hundred ninety-nine thousand, six hundred sixty-six".