1668403550674 has 16 divisors (see below), whose sum is σ = 2860350935616. Its totient is φ = 714972452400.

The previous prime is 1668403550669. The next prime is 1668403550731. The reversal of 1668403550674 is 4760553048661.

It is a happy number.

It is a super-2 number, since 2×1668403550674² (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 7 ways as a sum of consecutive naturals, for example, 4623292 + ... + 4971079.

It is an arithmetic number, because the mean of its divisors is an integer number (178771933476).

Almost surely, 2^{1668403550674} is an apocalyptic number.

1668403550674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1668403550674 is a deficient number, since it is larger than the sum of its proper divisors (1191947384942).

1668403550674 is a wasteful number, since it uses less digits than its factorization.

1668403550674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9606801.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 1668403550674 in words is "one trillion, six hundred sixty-eight billion, four hundred three million, five hundred fifty thousand, six hundred seventy-four".