66651301 has 4 divisors (see below), whose sum is σ = 66904992. Its totient is φ = 66397612.

The previous prime is 66651283. The next prime is 66651317. The reversal of 66651301 is 10315666.

66651301 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66651301 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 66651301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66651331) 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, 126451 + ... + 126976.

It is an arithmetic number, because the mean of its divisors is an integer number (16726248).

Almost surely, 2^66651301 is an apocalyptic number.

It is an amenable number.

66651301 is a deficient number, since it is larger than the sum of its proper divisors (253691).

66651301 is a wasteful number, since it uses less digits than its factorization.

66651301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253690.

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

The square root of 66651301 is about 8164.0248039800. The cubic root of 66651301 is about 405.4489782817.

Adding to 66651301 its reverse (10315666), we get a palindrome (76966967).

The spelling of 66651301 in words is "sixty-six million, six hundred fifty-one thousand, three hundred one".