1666958898008 has 32 divisors (see below), whose sum is σ = 3135995699760. Its totient is φ = 830693842560.

The previous prime is 1666958897999. The next prime is 1666958898061. The reversal of 1666958898008 is 8008988596661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40309310 + ... + 40350642.

Almost surely, 2^{1666958898008} is an apocalyptic number.

It is an amenable number.

1666958898008 is a deficient number, since it is larger than the sum of its proper divisors (1469036801752).

1666958898008 is a wasteful number, since it uses less digits than its factorization.

1666958898008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58067 (or 58063 counting only the distinct ones).

The product of its (nonzero) digits is 358318080, while the sum is 74.

The spelling of 1666958898008 in words is "one trillion, six hundred sixty-six billion, nine hundred fifty-eight million, eight hundred ninety-eight thousand, eight".