1026666686 has 16 divisors (see below), whose sum is σ = 1701484704. Its totient is φ = 462130944.

The previous prime is 1026666679. The next prime is 1026666689. The reversal of 1026666686 is 6866666201.

It is a super-4 number, since 4×1026666686⁴ (a number of 37 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1026666686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026666689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655655 + ... + 657218.

It is an arithmetic number, because the mean of its divisors is an integer number (106342794).

Almost surely, 2^1026666686 is an apocalyptic number.

1026666686 is a deficient number, since it is larger than the sum of its proper divisors (674818018).

1026666686 is a wasteful number, since it uses less digits than its factorization.

1026666686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312915.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 1026666686 is about 32041.6398768852. The cubic root of 1026666686 is about 1008.8110330177.

The spelling of 1026666686 in words is "one billion, twenty-six million, six hundred sixty-six thousand, six hundred eighty-six".