13552649666 has 8 divisors (see below), whose sum is σ = 20329693500. Its totient is φ = 6776085168.

The previous prime is 13552649659. The next prime is 13552649681. The reversal of 13552649666 is 66694625531.

It can be written as a sum of positive squares in 2 ways, for example, as 11873371225 + 1679278441 = 108965^2 + 40979^2 .

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

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, 37961 + ... + 168956.

Almost surely, 2^13552649666 is an apocalyptic number.

13552649666 is a deficient number, since it is larger than the sum of its proper divisors (6777043834).

13552649666 is a wasteful number, since it uses less digits than its factorization.

13552649666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239668.

The product of its digits is 6998400, while the sum is 53.

The spelling of 13552649666 in words is "thirteen billion, five hundred fifty-two million, six hundred forty-nine thousand, six hundred sixty-six".