1547228666 has 8 divisors (see below), whose sum is σ = 2374816224. Its totient is φ = 755623260.

The previous prime is 1547228659. The next prime is 1547228689. The reversal of 1547228666 is 6668227451.

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 1547228666.

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, 8995430 + ... + 8995601.

It is an arithmetic number, because the mean of its divisors is an integer number (296852028).

Almost surely, 2^1547228666 is an apocalyptic number.

1547228666 is a deficient number, since it is larger than the sum of its proper divisors (827587558).

1547228666 is a wasteful number, since it uses less digits than its factorization.

1547228666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17991076.

The product of its digits is 967680, while the sum is 47.

The square root of 1547228666 is about 39334.8276467560. The cubic root of 1547228666 is about 1156.6043846720.

The spelling of 1547228666 in words is "one billion, five hundred forty-seven million, two hundred twenty-eight thousand, six hundred sixty-six".