1666354350 has 24 divisors (see below), whose sum is σ = 4132559160. Its totient is φ = 444361120.

The previous prime is 1666354337. The next prime is 1666354351. The reversal of 1666354350 is 534536661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1666354299 and 1666354308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666354351) 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, 5554365 + ... + 5554664.

It is an arithmetic number, because the mean of its divisors is an integer number (172189965).

Almost surely, 2^1666354350 is an apocalyptic number.

1666354350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666354350 is an abundant number, since it is smaller than the sum of its proper divisors (2466204810).

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

1666354350 is a wasteful number, since it uses less digits than its factorization.

1666354350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11109044 (or 11109039 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 1666354350 is about 40821.0037848165. The cubic root of 1666354350 is about 1185.5570383996.

The spelling of 1666354350 in words is "one billion, six hundred sixty-six million, three hundred fifty-four thousand, three hundred fifty".