66265778053 has 4 divisors (see below), whose sum is σ = 66281399968. Its totient is φ = 66250156140.

The previous prime is 66265777993. The next prime is 66265778069. The reversal of 66265778053 is 35087756266.

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 66265778053 - 2⁹ = 66265777541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66265777985 and 66265778003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66265778353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7804593 + ... + 7813078.

It is an arithmetic number, because the mean of its divisors is an integer number (16570349992).

Almost surely, 2^66265778053 is an apocalyptic number.

It is an amenable number.

66265778053 is a deficient number, since it is larger than the sum of its proper divisors (15621915).

66265778053 is a wasteful number, since it uses less digits than its factorization.

66265778053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15621914.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 66265778053 in words is "sixty-six billion, two hundred sixty-five million, seven hundred seventy-eight thousand, fifty-three".