66164597 has 4 divisors (see below), whose sum is σ = 66183840. Its totient is φ = 66145356.

The previous prime is 66164591. The next prime is 66164641. The reversal of 66164597 is 79546166.

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 not a de Polignac number, because 66164597 - 2¹⁴ = 66148213 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 (66164591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2897 + ... + 11862.

It is an arithmetic number, because the mean of its divisors is an integer number (16545960).

Almost surely, 2^66164597 is an apocalyptic number.

It is an amenable number.

66164597 is a deficient number, since it is larger than the sum of its proper divisors (19243).

66164597 is a wasteful number, since it uses less digits than its factorization.

66164597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19242.

The product of its digits is 272160, while the sum is 44.

The square root of 66164597 is about 8134.1623416305. The cubic root of 66164597 is about 404.4596706426.

The spelling of 66164597 in words is "sixty-six million, one hundred sixty-four thousand, five hundred ninety-seven".