1668553350 has 24 divisors (see below), whose sum is σ = 4138012680. Its totient is φ = 444947520.

The previous prime is 1668553339. The next prime is 1668553351. The reversal of 1668553350 is 533558661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668553351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5561695 + ... + 5561994.

It is an arithmetic number, because the mean of its divisors is an integer number (172417195).

Almost surely, 2^1668553350 is an apocalyptic number.

1668553350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668553350 is an abundant number, since it is smaller than the sum of its proper divisors (2469459330).

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

1668553350 is a wasteful number, since it uses less digits than its factorization.

1668553350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11123704 (or 11123699 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 1668553350 is about 40847.9295680944. The cubic root of 1668553350 is about 1186.0783148768.

The spelling of 1668553350 in words is "one billion, six hundred sixty-eight million, five hundred fifty-three thousand, three hundred fifty".