1666796768 has 96 divisors (see below), whose sum is σ = 4071481344. Its totient is φ = 654054912.

The previous prime is 1666796753. The next prime is 1666796783. The reversal of 1666796768 is 8676976661.

It is an interprime number because it is at equal distance from previous prime (1666796753) and next prime (1666796783).

It is a super-2 number, since 2×1666796768² = 5556422931630491648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1666796768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367571 + ... + 372077.

It is an arithmetic number, because the mean of its divisors is an integer number (42411264).

Almost surely, 2^1666796768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666796768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2035740672).

1666796768 is an abundant number, since it is smaller than the sum of its proper divisors (2404684576).

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

1666796768 is a wasteful number, since it uses less digits than its factorization.

1666796768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664 (or 4656 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 62.

The square root of 1666796768 is about 40826.4224246994. The cubic root of 1666796768 is about 1185.6619511314.

The spelling of 1666796768 in words is "one billion, six hundred sixty-six million, seven hundred ninety-six thousand, seven hundred sixty-eight".