66949603 has 8 divisors (see below), whose sum is σ = 79152480. Its totient is φ = 55406400.

The previous prime is 66949591. The next prime is 66949607. The reversal of 66949603 is 30694966.

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

It is a de Polignac number, because none of the positive numbers 2^k-66949603 is a prime.

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 66949603.

It is not an unprimeable number, because it can be changed into a prime (66949607) 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, 164698 + ... + 165103.

It is an arithmetic number, because the mean of its divisors is an integer number (9894060).

Almost surely, 2^66949603 is an apocalyptic number.

66949603 is a deficient number, since it is larger than the sum of its proper divisors (12202877).

66949603 is a wasteful number, since it uses less digits than its factorization.

66949603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329837.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 66949603 is about 8182.2737060062. The cubic root of 66949603 is about 406.0529487594.

The spelling of 66949603 in words is "sixty-six million, nine hundred forty-nine thousand, six hundred three".