57544211666 has 4 divisors (see below), whose sum is σ = 86316317502. Its totient is φ = 28772105832.

The previous prime is 57544211657. The next prime is 57544211689. The reversal of 57544211666 is 66611244575.

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., 57469993441 + 74218225 = 239729^2 + 8615^2 .

It is a super-2 number, since 2×57544211666² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57544211666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14386052915 + ... + 14386052918.

Almost surely, 2^57544211666 is an apocalyptic number.

57544211666 is a deficient number, since it is larger than the sum of its proper divisors (28772105836).

57544211666 is a wasteful number, since it uses less digits than its factorization.

57544211666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28772105835.

The product of its digits is 1209600, while the sum is 47.

The spelling of 57544211666 in words is "fifty-seven billion, five hundred forty-four million, two hundred eleven thousand, six hundred sixty-six".