1020666772 has 6 divisors (see below), whose sum is σ = 1786166858. Its totient is φ = 510333384.

The previous prime is 1020666769. The next prime is 1020666781. The reversal of 1020666772 is 2776660201.

1020666772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 911798416 + 108868356 = 30196^2 + 10434^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127583343 + ... + 127583350.

Almost surely, 2^1020666772 is an apocalyptic number.

It is an amenable number.

1020666772 is a deficient number, since it is larger than the sum of its proper divisors (765500086).

1020666772 is a wasteful number, since it uses less digits than its factorization.

1020666772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255166697 (or 255166695 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 1020666772 is about 31947.8758605326. The cubic root of 1020666772 is about 1006.8420042134.

The spelling of 1020666772 in words is "one billion, twenty million, six hundred sixty-six thousand, seven hundred seventy-two".