1666223480 has 16 divisors (see below), whose sum is σ = 3749002920. Its totient is φ = 666489376.

The previous prime is 1666223459. The next prime is 1666223483. The reversal of 1666223480 is 843226661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666223483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20827754 + ... + 20827833.

Almost surely, 2^1666223480 is an apocalyptic number.

1666223480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666223480 is an abundant number, since it is smaller than the sum of its proper divisors (2082779440).

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

1666223480 is a wasteful number, since it uses less digits than its factorization.

1666223480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41655598 (or 41655594 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 1666223480 is about 40819.4007795313. The cubic root of 1666223480 is about 1185.5260010012.

The spelling of 1666223480 in words is "one billion, six hundred sixty-six million, two hundred twenty-three thousand, four hundred eighty".