1076666661 has 108 divisors (see below), whose sum is σ = 1999179468. Its totient is φ = 576108288.

The previous prime is 1076666659. The next prime is 1076666681. The reversal of 1076666661 is 1666666701.

It can be written as a sum of positive squares in 2 ways, for example, as 972504225 + 104162436 = 31185^2 + 10206^2 .

It is not a de Polignac number, because 1076666661 - 2¹ = 1076666659 is a prime.

It is a super-3 number, since 3×1076666661³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1076666641) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 5465215 + ... + 5465411.

It is an arithmetic number, because the mean of its divisors is an integer number (18510921).

Almost surely, 2^1076666661 is an apocalyptic number.

It is an amenable number.

1076666661 is a deficient number, since it is larger than the sum of its proper divisors (922512807).

1076666661 is an frugal number, since it uses more digits than its factorization.

1076666661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1076666661 is about 32812.5991198503. The cubic root of 1076666661 is about 1024.9289376870.

The spelling of 1076666661 in words is "one billion, seventy-six million, six hundred sixty-six thousand, six hundred sixty-one".