99066640 has 20 divisors (see below), whose sum is σ = 230330124. Its totient is φ = 39626624.

The previous prime is 99066601. The next prime is 99066641. The reversal of 99066640 is 4666099.

It can be written as a sum of positive squares in 2 ways, for example, as 37161216 + 61905424 = 6096^2 + 7868^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 99066593 and 99066602.

It is not an unprimeable number, because it can be changed into a prime (99066641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619087 + ... + 619246.

Almost surely, 2^99066640 is an apocalyptic number.

It is an amenable number.

99066640 is an abundant number, since it is smaller than the sum of its proper divisors (131263484).

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

99066640 is a wasteful number, since it uses less digits than its factorization.

99066640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238346 (or 1238340 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 99066640 is about 9953.2225937131. Note that the first 3 decimals coincide. The cubic root of 99066640 is about 462.7102759442.

The spelling of 99066640 in words is "ninety-nine million, sixty-six thousand, six hundred forty".