1666667020337 has 8 divisors (see below), whose sum is σ = 1818241771680. Its totient is φ = 1515102196960.

The previous prime is 1666667020331. The next prime is 1666667020393. The reversal of 1666667020337 is 7330207666661.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1666667020337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666667020331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2128787 + ... + 2804472.

It is an arithmetic number, because the mean of its divisors is an integer number (227280221460).

Almost surely, 2^{1666667020337} is an apocalyptic number.

It is an amenable number.

1666667020337 is a deficient number, since it is larger than the sum of its proper divisors (151574751343).

1666667020337 is a wasteful number, since it uses less digits than its factorization.

1666667020337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963983.

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

The spelling of 1666667020337 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-seven million, twenty thousand, three hundred thirty-seven".