10667666693 has 4 divisors (see below), whose sum is σ = 10667916768. Its totient is φ = 10667416620.

The previous prime is 10667666689. The next prime is 10667666701. The reversal of 10667666693 is 39666676601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39666676601 = 1997 ⋅19863133.

It is a cyclic number.

It is not a de Polignac number, because 10667666693 - 2² = 10667666689 is a prime.

It is a super-2 number, since 2×10667666693² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10667666663) 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, 43193 + ... + 152318.

It is an arithmetic number, because the mean of its divisors is an integer number (2666979192).

Almost surely, 2^10667666693 is an apocalyptic number.

It is an amenable number.

10667666693 is a deficient number, since it is larger than the sum of its proper divisors (250075).

10667666693 is an equidigital number, since it uses as much as digits as its factorization.

10667666693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250074.

The product of its (nonzero) digits is 8817984, while the sum is 56.

The spelling of 10667666693 in words is "ten billion, six hundred sixty-seven million, six hundred sixty-six thousand, six hundred ninety-three".