66344501 has 4 divisors (see below), whose sum is σ = 66458112. Its totient is φ = 66230892.

The previous prime is 66344491. The next prime is 66344503. The reversal of 66344501 is 10544366.

It is a happy number.

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-66344501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66344503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55925 + ... + 57098.

It is an arithmetic number, because the mean of its divisors is an integer number (16614528).

Almost surely, 2^66344501 is an apocalyptic number.

It is an amenable number.

66344501 is a deficient number, since it is larger than the sum of its proper divisors (113611).

66344501 is a wasteful number, since it uses less digits than its factorization.

66344501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113610.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66344501 is about 8145.2133796482. The cubic root of 66344501 is about 404.8259191907.

Adding to 66344501 its reverse (10544366), we get a palindrome (76888867).

The spelling of 66344501 in words is "sixty-six million, three hundred forty-four thousand, five hundred one".