66990098 has 32 divisors (see below), whose sum is σ = 122373504. Its totient is φ = 26848512.

The previous prime is 66990089. The next prime is 66990103. The reversal of 66990098 is 89009966.

It is a happy number.

66990098 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40361 + ... + 41987.

It is an arithmetic number, because the mean of its divisors is an integer number (3824172).

Almost surely, 2^66990098 is an apocalyptic number.

66990098 is a deficient number, since it is larger than the sum of its proper divisors (55383406).

66990098 is a wasteful number, since it uses less digits than its factorization.

66990098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 66990098 is about 8184.7478886035. The cubic root of 66990098 is about 406.1348003775.

The spelling of 66990098 in words is "sixty-six million, nine hundred ninety thousand, ninety-eight".