66990133 has 8 divisors (see below), whose sum is σ = 77639040. Its totient is φ = 56610960.

The previous prime is 66990127. The next prime is 66990137. The reversal of 66990133 is 33109966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66990133 - 2¹⁷ = 66859061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66990092 and 66990101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66990137) 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, 66898 + ... + 67891.

It is an arithmetic number, because the mean of its divisors is an integer number (9704880).

Almost surely, 2^66990133 is an apocalyptic number.

It is an amenable number.

66990133 is a deficient number, since it is larger than the sum of its proper divisors (10648907).

66990133 is a wasteful number, since it uses less digits than its factorization.

66990133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134867.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 66990133 is about 8184.7500267265. The cubic root of 66990133 is about 406.1348711080.

The spelling of 66990133 in words is "sixty-six million, nine hundred ninety thousand, one hundred thirty-three".