66153601 has 4 divisors (see below), whose sum is σ = 66636612. Its totient is φ = 65670592.

The previous prime is 66153587. The next prime is 66153631. The reversal of 66153601 is 10635166.

66153601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49014001 + 17139600 = 7001^2 + 4140^2 .

It is a cyclic number.

It is not a de Polignac number, because 66153601 - 2¹⁵ = 66120833 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 66153601.

It is not an unprimeable number, because it can be changed into a prime (66153631) 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 3 ways as a sum of consecutive naturals, for example, 241300 + ... + 241573.

It is an arithmetic number, because the mean of its divisors is an integer number (16659153).

Almost surely, 2^66153601 is an apocalyptic number.

It is an amenable number.

66153601 is a deficient number, since it is larger than the sum of its proper divisors (483011).

66153601 is a wasteful number, since it uses less digits than its factorization.

66153601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483010.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 66153601 is about 8133.4863988329. The cubic root of 66153601 is about 404.4372634684.

Adding to 66153601 its reverse (10635166), we get a palindrome (76788767).

The spelling of 66153601 in words is "sixty-six million, one hundred fifty-three thousand, six hundred one".