66602001 has 8 divisors (see below), whose sum is σ = 88840800. Its totient is φ = 44382272.

The previous prime is 66601991. The next prime is 66602033. The reversal of 66602001 is 10020666.

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 66602001 - 2¹⁰ = 66600977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66602071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9406 + ... + 14888.

It is an arithmetic number, because the mean of its divisors is an integer number (11105100).

Almost surely, 2^66602001 is an apocalyptic number.

It is an amenable number.

66602001 is a deficient number, since it is larger than the sum of its proper divisors (22238799).

66602001 is a wasteful number, since it uses less digits than its factorization.

66602001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9535.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 66602001 is about 8161.0049013587. The cubic root of 66602001 is about 405.3489874104.

Adding to 66602001 its reverse (10020666), we get a palindrome (76622667).

The spelling of 66602001 in words is "sixty-six million, six hundred two thousand, one".