3808180661 has 2 divisors, whose sum is σ = 3808180662. Its totient is φ = 3808180660.

The previous prime is 3808180657. The next prime is 3808180681. The reversal of 3808180661 is 1660818083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3170365636 + 637815025 = 56306^2 + 25255^2 .

It is a cyclic number.

It is not a de Polignac number, because 3808180661 - 2² = 3808180657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3808180601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1904090330 + 1904090331.

It is an arithmetic number, because the mean of its divisors is an integer number (1904090331).

Almost surely, 2^3808180661 is an apocalyptic number.

It is an amenable number.

3808180661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3808180661 is an equidigital number, since it uses as much as digits as its factorization.

3808180661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 3808180661 is about 61710.4582789660. The cubic root of 3808180661 is about 1561.6097591264.

The spelling of 3808180661 in words is "three billion, eight hundred eight million, one hundred eighty thousand, six hundred sixty-one".