66461603 has 8 divisors (see below), whose sum is σ = 71745408. Its totient is φ = 61202304.

The previous prime is 66461597. The next prime is 66461611. The reversal of 66461603 is 30616466.

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 66461603 - 2¹² = 66457507 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 66461603.

It is not an unprimeable number, because it can be changed into a prime (66461663) 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, 275 + ... + 11532.

It is an arithmetic number, because the mean of its divisors is an integer number (8968176).

Almost surely, 2^66461603 is an apocalyptic number.

66461603 is a deficient number, since it is larger than the sum of its proper divisors (5283805).

66461603 is a wasteful number, since it uses less digits than its factorization.

66461603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12253.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 66461603 is about 8152.3986040919. The cubic root of 66461603 is about 405.0639598219.

The spelling of 66461603 in words is "sixty-six million, four hundred sixty-one thousand, six hundred three".