66702546413 has 4 divisors (see below), whose sum is σ = 66712993020. Its totient is φ = 66692099808.

The previous prime is 66702546367. The next prime is 66702546419. The reversal of 66702546413 is 31464520766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335512489 + 66367033924 = 18317^2 + 257618^2 .

It is a cyclic number.

It is not a de Polignac number, because 66702546413 - 2¹⁶ = 66702480877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66702546419) 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, 5213720 + ... + 5226497.

It is an arithmetic number, because the mean of its divisors is an integer number (16678248255).

Almost surely, 2^66702546413 is an apocalyptic number.

It is an amenable number.

66702546413 is a deficient number, since it is larger than the sum of its proper divisors (10446607).

66702546413 is a wasteful number, since it uses less digits than its factorization.

66702546413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10446606.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 66702546413 in words is "sixty-six billion, seven hundred two million, five hundred forty-six thousand, four hundred thirteen".