91660003 has 8 divisors (see below), whose sum is σ = 93386880. Its totient is φ = 89940480.

The previous prime is 91660001. The next prime is 91660027. The reversal of 91660003 is 30006619.

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

It is a cyclic number.

It is not a de Polignac number, because 91660003 - 2¹ = 91660001 is a prime.

It is a super-2 number, since 2×91660003² = 16803112299920018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91660003.

It is not an unprimeable number, because it can be changed into a prime (91660001) 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 7 ways as a sum of consecutive naturals, for example, 27651 + ... + 30787.

It is an arithmetic number, because the mean of its divisors is an integer number (11673360).

Almost surely, 2^91660003 is an apocalyptic number.

91660003 is a deficient number, since it is larger than the sum of its proper divisors (1726877).

91660003 is a wasteful number, since it uses less digits than its factorization.

91660003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 91660003 is about 9573.9230725967. The cubic root of 91660003 is about 450.8789454897.

The spelling of 91660003 in words is "ninety-one million, six hundred sixty thousand, three".