3661664663802 has 8 divisors (see below), whose sum is σ = 7323329327616. Its totient is φ = 1220554887932.

The previous prime is 3661664663771. The next prime is 3661664663807. The reversal of 3661664663802 is 2083664661663.

It is a happy number.

3661664663802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

3661664663802 is an admirable number.

It is a super-2 number, since 2×3661664663802² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3661664663807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305138721978 + ... + 305138721989.

It is an arithmetic number, because the mean of its divisors is an integer number (915416165952).

Almost surely, 2^{3661664663802} is an apocalyptic number.

3661664663802 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3661664663802 is a wasteful number, since it uses less digits than its factorization.

3661664663802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610277443972.

The product of its (nonzero) digits is 26873856, while the sum is 57.

The spelling of 3661664663802 in words is "three trillion, six hundred sixty-one billion, six hundred sixty-four million, six hundred sixty-three thousand, eight hundred two".