920387767866 has 128 divisors (see below), whose sum is σ = 2173106880000. Its totient is φ = 259736666112.

The previous prime is 920387767841. The next prime is 920387767891. The reversal of 920387767866 is 668767783029.

It is an interprime number because it is at equal distance from previous prime (920387767841) and next prime (920387767891).

It is a super-2 number, since 2×920387767866² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 920387767866.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 222906090 + ... + 222910218.

It is an arithmetic number, because the mean of its divisors is an integer number (16977397500).

Almost surely, 2^920387767866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920387767866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1086553440000).

920387767866 is an abundant number, since it is smaller than the sum of its proper divisors (1252719112134).

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

920387767866 is a wasteful number, since it uses less digits than its factorization.

920387767866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5461 (or 5447 counting only the distinct ones).

The product of its (nonzero) digits is 256048128, while the sum is 69.

The spelling of 920387767866 in words is "nine hundred twenty billion, three hundred eighty-seven million, seven hundred sixty-seven thousand, eight hundred sixty-six".