1670646128266 has 8 divisors (see below), whose sum is σ = 2523997748160. Its totient is φ = 829313545548.

The previous prime is 1670646128227. The next prime is 1670646128297. The reversal of 1670646128266 is 6628216460761.

It is a happy number.

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

It is a super-2 number, since 2×1670646128266² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3004758946 + ... + 3004759501.

It is an arithmetic number, because the mean of its divisors is an integer number (315499718520).

Almost surely, 2^{1670646128266} is an apocalyptic number.

1670646128266 is a deficient number, since it is larger than the sum of its proper divisors (853351619894).

1670646128266 is a wasteful number, since it uses less digits than its factorization.

1670646128266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009518588.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 1670646128266 in words is "one trillion, six hundred seventy billion, six hundred forty-six million, one hundred twenty-eight thousand, two hundred sixty-six".