1666853500351 has 24 divisors (see below), whose sum is σ = 1929458225520. Its totient is φ = 1426511446272.

The previous prime is 1666853500331. The next prime is 1666853500369. The reversal of 1666853500351 is 1530053586661.

It is not a de Polignac number, because 1666853500351 - 2²⁷ = 1666719282623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1666853500295 and 1666853500304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666853500331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151980 + ... + 1832158.

It is an arithmetic number, because the mean of its divisors is an integer number (80394092730).

Almost surely, 2^{1666853500351} is an apocalyptic number.

1666853500351 is a deficient number, since it is larger than the sum of its proper divisors (262604725169).

1666853500351 is a wasteful number, since it uses less digits than its factorization.

1666853500351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680343 (or 1680276 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 1666853500351 in words is "one trillion, six hundred sixty-six billion, eight hundred fifty-three million, five hundred thousand, three hundred fifty-one".