66262779552 has 48 divisors (see below), whose sum is σ = 174841087680. Its totient is φ = 21973143552.

The previous prime is 66262779551. The next prime is 66262779553. The reversal of 66262779552 is 25597726266.

66262779552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66262779551) and next prime (66262779553).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×66262779552³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66262779492 and 66262779501.

It is not an unprimeable number, because it can be changed into a prime (66262779551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1769652 + ... + 1806707.

It is an arithmetic number, because the mean of its divisors is an integer number (3642522660).

Almost surely, 2^66262779552 is an apocalyptic number.

It is an amenable number.

66262779552 is an abundant number, since it is smaller than the sum of its proper divisors (108578308128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66262779552 is a wasteful number, since it uses less digits than its factorization.

66262779552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576565 (or 3576557 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 57.

The spelling of 66262779552 in words is "sixty-six billion, two hundred sixty-two million, seven hundred seventy-nine thousand, five hundred fifty-two".