3666706737437 has 4 divisors (see below), whose sum is σ = 3676537050780. Its totient is φ = 3656876424096.

The previous prime is 3666706737409. The next prime is 3666706737553. The reversal of 3666706737437 is 7347376076663.

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 2 ways, for example, as 879523233241 + 2787183504196 = 937829^2 + 1669486^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666706737437 - 2⁸ = 3666706737181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666706737137) 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, 4915156112 + ... + 4915156857.

It is an arithmetic number, because the mean of its divisors is an integer number (919134262695).

Almost surely, 2^{3666706737437} is an apocalyptic number.

It is an amenable number.

3666706737437 is a deficient number, since it is larger than the sum of its proper divisors (9830313343).

3666706737437 is an equidigital number, since it uses as much as digits as its factorization.

3666706737437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9830313342.

The product of its (nonzero) digits is 336063168, while the sum is 65.

The spelling of 3666706737437 in words is "three trillion, six hundred sixty-six billion, seven hundred six million, seven hundred thirty-seven thousand, four hundred thirty-seven".