66265013 has 4 divisors (see below), whose sum is σ = 66333408. Its totient is φ = 66196620.

The previous prime is 66265009. The next prime is 66265019. The reversal of 66265013 is 31056266.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31056266 = 2 ⋅15528133.

It is a cyclic number.

It is not a de Polignac number, because 66265013 - 2² = 66265009 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 (66265019) 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, 32723 + ... + 34688.

It is an arithmetic number, because the mean of its divisors is an integer number (16583352).

Almost surely, 2^66265013 is an apocalyptic number.

It is an amenable number.

66265013 is a deficient number, since it is larger than the sum of its proper divisors (68395).

66265013 is an equidigital number, since it uses as much as digits as its factorization.

66265013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68394.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66265013 is about 8140.3324870671. The cubic root of 66265013 is about 404.6641792726.

The spelling of 66265013 in words is "sixty-six million, two hundred sixty-five thousand, thirteen".