66870099 has 12 divisors (see below), whose sum is σ = 96681312. Its totient is φ = 44538000.

The previous prime is 66870079. The next prime is 66870109. The reversal of 66870099 is 99007866.

It is not a de Polignac number, because 66870099 - 2⁹ = 66869587 is a prime.

It is a super-2 number, since 2×66870099² = 8943220280539602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66870059) 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 11 ways as a sum of consecutive naturals, for example, 8854 + ... + 14564.

It is an arithmetic number, because the mean of its divisors is an integer number (8056776).

Almost surely, 2^66870099 is an apocalyptic number.

66870099 is a deficient number, since it is larger than the sum of its proper divisors (29811213).

66870099 is a wasteful number, since it uses less digits than its factorization.

66870099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018 (or 7015 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 66870099 is about 8177.4139555241. The cubic root of 66870099 is about 405.8921530789.

The spelling of 66870099 in words is "sixty-six million, eight hundred seventy thousand, ninety-nine".