1682867666 has 4 divisors (see below), whose sum is σ = 2524301502. Its totient is φ = 841433832.

The previous prime is 1682867653. The next prime is 1682867701. The reversal of 1682867666 is 6667682861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1426195225 + 256672441 = 37765^2 + 16021^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420716915 + ... + 420716918.

Almost surely, 2^1682867666 is an apocalyptic number.

1682867666 is a deficient number, since it is larger than the sum of its proper divisors (841433836).

1682867666 is an equidigital number, since it uses as much as digits as its factorization.

1682867666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841433835.

The product of its digits is 6967296, while the sum is 56.

The square root of 1682867666 is about 41022.7700917430. The cubic root of 1682867666 is about 1189.4604022068.

The spelling of 1682867666 in words is "one billion, six hundred eighty-two million, eight hundred sixty-seven thousand, six hundred sixty-six".