66807003 has 4 divisors (see below), whose sum is σ = 89076008. Its totient is φ = 44538000.

The previous prime is 66806989. The next prime is 66807011. The reversal of 66807003 is 30070866.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66807003 - 2¹³ = 66798811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66807023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11134498 + ... + 11134503.

It is an arithmetic number, because the mean of its divisors is an integer number (22269002).

Almost surely, 2^66807003 is an apocalyptic number.

66807003 is a deficient number, since it is larger than the sum of its proper divisors (22269005).

66807003 is a wasteful number, since it uses less digits than its factorization.

66807003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22269004.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 66807003 is about 8173.5551016678. Note that the first 3 decimals coincide. The cubic root of 66807003 is about 405.7644516059.

Adding to 66807003 its reverse (30070866), we get a palindrome (96877869).

The spelling of 66807003 in words is "sixty-six million, eight hundred seven thousand, three".