66343573 has 4 divisors (see below), whose sum is σ = 69835360. Its totient is φ = 62851788.

The previous prime is 66343549. The next prime is 66343577. The reversal of 66343573 is 37534366.

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 66343573 - 2²¹ = 64246421 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 (66343577) 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, 1745865 + ... + 1745902.

It is an arithmetic number, because the mean of its divisors is an integer number (17458840).

Almost surely, 2^66343573 is an apocalyptic number.

It is an amenable number.

66343573 is a deficient number, since it is larger than the sum of its proper divisors (3491787).

66343573 is a wasteful number, since it uses less digits than its factorization.

66343573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491786.

The product of its digits is 136080, while the sum is 37.

The square root of 66343573 is about 8145.1564134767. The cubic root of 66343573 is about 404.8240316682.

The spelling of 66343573 in words is "sixty-six million, three hundred forty-three thousand, five hundred seventy-three".