552778508766 has 32 divisors (see below), whose sum is σ = 1212184372608. Its totient is φ = 166658337440.

The previous prime is 552778508713. The next prime is 552778508767. The reversal of 552778508766 is 667805877255.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 552778508697 and 552778508706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552778508767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21244440 + ... + 21270443.

It is an arithmetic number, because the mean of its divisors is an integer number (37880761644).

Almost surely, 2^552778508766 is an apocalyptic number.

552778508766 is an abundant number, since it is smaller than the sum of its proper divisors (659405863842).

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

552778508766 is a wasteful number, since it uses less digits than its factorization.

552778508766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42515096.

The product of its (nonzero) digits is 197568000, while the sum is 66.

The spelling of 552778508766 in words is "five hundred fifty-two billion, seven hundred seventy-eight million, five hundred eight thousand, seven hundred sixty-six".