1666430 has 8 divisors (see below), whose sum is σ = 2999592. Its totient is φ = 666568.

The previous prime is 1666429. The next prime is 1666447. The reversal of 1666430 is 346661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1666430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83312 + ... + 83331.

It is an arithmetic number, because the mean of its divisors is an integer number (374949).

2^1666430 is an apocalyptic number.

1666430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666430 is a deficient number, since it is larger than the sum of its proper divisors (1333162).

1666430 is a wasteful number, since it uses less digits than its factorization.

1666430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166650.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1666430 is about 1290.9027848758. The cubic root of 1666430 is about 118.5574978968.

The spelling of 1666430 in words is "one million, six hundred sixty-six thousand, four hundred thirty".