1668635464950 has 72 divisors (see below), whose sum is σ = 4746777144408. Its totient is φ = 418794781440.

The previous prime is 1668635464949. The next prime is 1668635464957. The reversal of 1668635464950 is 594645368661.

1668635464950 is a `hidden beast` number, since 1 + 6 + 6 + 86 + 3 + 5 + 464 + 95 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668635464957) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 109053492 + ... + 109068791.

It is an arithmetic number, because the mean of its divisors is an integer number (65927460339).

Almost surely, 2^{1668635464950} is an apocalyptic number.

1668635464950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668635464950 is an abundant number, since it is smaller than the sum of its proper divisors (3078141679458).

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

1668635464950 is a wasteful number, since it uses less digits than its factorization.

1668635464950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218122318 (or 218122310 counting only the distinct ones).

The product of its (nonzero) digits is 111974400, while the sum is 63.

The spelling of 1668635464950 in words is "one trillion, six hundred sixty-eight billion, six hundred thirty-five million, four hundred sixty-four thousand, nine hundred fifty".