3666687381019 has 4 divisors (see below), whose sum is σ = 3948740256496. Its totient is φ = 3384634505544.

The previous prime is 3666687381001. The next prime is 3666687381023. The reversal of 3666687381019 is 9101837866663.

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

It is a cyclic number.

It is not a de Polignac number, because 3666687381019 - 2³¹ = 3664539897371 is a prime.

It is a super-2 number, since 2×3666687381019² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3666687381719) 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, 141026437719 + ... + 141026437744.

It is an arithmetic number, because the mean of its divisors is an integer number (987185064124).

Almost surely, 2^{3666687381019} is an apocalyptic number.

3666687381019 is a deficient number, since it is larger than the sum of its proper divisors (282052875477).

3666687381019 is a wasteful number, since it uses less digits than its factorization.

3666687381019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282052875476.

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 3666687381019 in words is "three trillion, six hundred sixty-six billion, six hundred eighty-seven million, three hundred eighty-one thousand, nineteen".