66345601 has 8 divisors (see below), whose sum is σ = 75905984. Its totient is φ = 56805840.

The previous prime is 66345599. The next prime is 66345607. The reversal of 66345601 is 10654366.

66345601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66345601 - 2¹ = 66345599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66345607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2506 + ... + 11788.

It is an arithmetic number, because the mean of its divisors is an integer number (9488248).

Almost surely, 2^66345601 is an apocalyptic number.

It is an amenable number.

66345601 is a deficient number, since it is larger than the sum of its proper divisors (9560383).

66345601 is a wasteful number, since it uses less digits than its factorization.

66345601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10311.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66345601 is about 8145.2809036890. The cubic root of 66345601 is about 404.8281565329.

Adding to 66345601 its reverse (10654366), we get a palindrome (76999967).

It can be divided in two parts, 663 and 45601, that added together give a palindrome (46264).

The spelling of 66345601 in words is "sixty-six million, three hundred forty-five thousand, six hundred one".