66672803 has 2 divisors, whose sum is σ = 66672804. Its totient is φ = 66672802.

The previous prime is 66672797. The next prime is 66672889. The reversal of 66672803 is 30827666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66672803 - 2⁴ = 66672787 is a prime.

It is not a weakly prime, because it can be changed into another prime (66672503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33336401 + 33336402.

It is an arithmetic number, because the mean of its divisors is an integer number (33336402).

Almost surely, 2^66672803 is an apocalyptic number.

66672803 is a deficient number, since it is larger than the sum of its proper divisors (1).

66672803 is an equidigital number, since it uses as much as digits as its factorization.

66672803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 66672803 is about 8165.3415727696. The cubic root of 66672803 is about 405.4925734628.

The spelling of 66672803 in words is "sixty-six million, six hundred seventy-two thousand, eight hundred three".