1666702036867 has 12 divisors (see below), whose sum is σ = 1940284419096. Its totient is φ = 1427520235680.

The previous prime is 1666702036861. The next prime is 1666702036891. The reversal of 1666702036867 is 7686302076661.

It is a happy number.

It is not a de Polignac number, because 1666702036867 - 2²³ = 1666693648259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666702036861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12809733 + ... + 12939190.

It is an arithmetic number, because the mean of its divisors is an integer number (161690368258).

Almost surely, 2^{1666702036867} is an apocalyptic number.

1666702036867 is a deficient number, since it is larger than the sum of its proper divisors (273582382229).

1666702036867 is a wasteful number, since it uses less digits than its factorization.

1666702036867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25750258 (or 25750251 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 1666702036867 in words is "one trillion, six hundred sixty-six billion, seven hundred two million, thirty-six thousand, eight hundred sixty-seven".