6666667037 has 4 divisors (see below), whose sum is σ = 6667369020. Its totient is φ = 6665965056.

The previous prime is 6666666997. The next prime is 6666667043. The reversal of 6666667037 is 7307666666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7307666666 = 2 ⋅3653833333.

It can be written as a sum of positive squares in 2 ways, for example, as 5845214116 + 821452921 = 76454^2 + 28661^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666667037 - 2⁶ = 6666666973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6666667037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666667097) 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, 336548 + ... + 355805.

It is an arithmetic number, because the mean of its divisors is an integer number (1666842255).

Almost surely, 2^6666667037 is an apocalyptic number.

It is an amenable number.

6666667037 is a deficient number, since it is larger than the sum of its proper divisors (701983).

6666667037 is an equidigital number, since it uses as much as digits as its factorization.

6666667037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701982.

The product of its (nonzero) digits is 6858432, while the sum is 53.

The square root of 6666667037 is about 81649.6603605918. The cubic root of 6666667037 is about 1882.0720926118.

The spelling of 6666667037 in words is "six billion, six hundred sixty-six million, six hundred sixty-seven thousand, thirty-seven".