1666851668350 has 48 divisors (see below), whose sum is σ = 3382575751296. Its totient is φ = 606059388000.

The previous prime is 1666851668333. The next prime is 1666851668393. The reversal of 1666851668350 is 538661586661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4833367 + ... + 5166733.

It is an arithmetic number, because the mean of its divisors is an integer number (70470328152).

Almost surely, 2^{1666851668350} is an apocalyptic number.

1666851668350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666851668350 is an abundant number, since it is smaller than the sum of its proper divisors (1715724082946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666851668350 is a wasteful number, since it uses less digits than its factorization.

1666851668350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342481 (or 342476 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 61.

The spelling of 1666851668350 in words is "one trillion, six hundred sixty-six billion, eight hundred fifty-one million, six hundred sixty-eight thousand, three hundred fifty".