66990183 has 32 divisors (see below), whose sum is σ = 103219200. Its totient is φ = 38278656.

The previous prime is 66990167. The next prime is 66990199. The reversal of 66990183 is 38109966.

It is an interprime number because it is at equal distance from previous prime (66990167) and next prime (66990199).

It is not a de Polignac number, because 66990183 - 2⁴ = 66990167 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66990103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51738 + ... + 53016.

It is an arithmetic number, because the mean of its divisors is an integer number (3225600).

Almost surely, 2^66990183 is an apocalyptic number.

66990183 is a deficient number, since it is larger than the sum of its proper divisors (36229017).

66990183 is a wasteful number, since it uses less digits than its factorization.

66990183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 66990183 is about 8184.7530811870. The cubic root of 66990183 is about 406.1349721514.

The spelling of 66990183 in words is "sixty-six million, nine hundred ninety thousand, one hundred eighty-three".