66494074753 has 4 divisors (see below), whose sum is σ = 66520643008. Its totient is φ = 66467506500.

The previous prime is 66494074729. The next prime is 66494074769. The reversal of 66494074753 is 35747049466.

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 66494074753 - 2²⁹ = 65957203841 is a prime.

It is a super-2 number, since 2×66494074753² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66494074694 and 66494074703.

It is not an unprimeable number, because it can be changed into a prime (66494084753) 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, 13280373 + ... + 13285378.

It is an arithmetic number, because the mean of its divisors is an integer number (16630160752).

Almost surely, 2^66494074753 is an apocalyptic number.

It is an amenable number.

66494074753 is a deficient number, since it is larger than the sum of its proper divisors (26568255).

66494074753 is a wasteful number, since it uses less digits than its factorization.

66494074753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26568254.

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 66494074753 in words is "sixty-six billion, four hundred ninety-four million, seventy-four thousand, seven hundred fifty-three".