3680407666 has 8 divisors (see below), whose sum is σ = 5945273964. Its totient is φ = 1698649680.

The previous prime is 3680407657. The next prime is 3680407739. The reversal of 3680407666 is 6667040863.

It can be written as a sum of positive squares in 2 ways, for example, as 3184232041 + 496175625 = 56429^2 + 22275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 70777045 + ... + 70777096.

Almost surely, 2^3680407666 is an apocalyptic number.

3680407666 is a deficient number, since it is larger than the sum of its proper divisors (2264866298).

3680407666 is a wasteful number, since it uses less digits than its factorization.

3680407666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141554156.

The product of its (nonzero) digits is 870912, while the sum is 46.

The square root of 3680407666 is about 60666.3635468618. The cubic root of 3680407666 is about 1543.9455338089.

The spelling of 3680407666 in words is "three billion, six hundred eighty million, four hundred seven thousand, six hundred sixty-six".