666572115562 has 4 divisors (see below), whose sum is σ = 999858173346. Its totient is φ = 333286057780.

The previous prime is 666572115551. The next prime is 666572115569. The reversal of 666572115562 is 265511275666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 616851589201 + 49720526361 = 785399^2 + 222981^2 .

It is not an unprimeable number, because it can be changed into a prime (666572115569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166643028889 + ... + 166643028892.

Almost surely, 2^666572115562 is an apocalyptic number.

666572115562 is a deficient number, since it is larger than the sum of its proper divisors (333286057784).

666572115562 is a wasteful number, since it uses less digits than its factorization.

666572115562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333286057783.

The product of its digits is 4536000, while the sum is 52.

The spelling of 666572115562 in words is "six hundred sixty-six billion, five hundred seventy-two million, one hundred fifteen thousand, five hundred sixty-two".