5161666557 has 8 divisors (see below), whose sum is σ = 6885266976. Its totient is φ = 3439588592.

The previous prime is 5161666547. The next prime is 5161666583. The reversal of 5161666557 is 7556661615.

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

It is a cyclic number.

It is not a de Polignac number, because 5161666557 - 2¹⁹ = 5161142269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161666547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372678 + ... + 386279.

It is an arithmetic number, because the mean of its divisors is an integer number (860658372).

Almost surely, 2^5161666557 is an apocalyptic number.

It is an amenable number.

5161666557 is a deficient number, since it is larger than the sum of its proper divisors (1723600419).

5161666557 is a wasteful number, since it uses less digits than its factorization.

5161666557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761227.

The product of its digits is 1134000, while the sum is 48.

The square root of 5161666557 is about 71844.7392437331. The cubic root of 5161666557 is about 1728.2105364269.

The spelling of 5161666557 in words is "five billion, one hundred sixty-one million, six hundred sixty-six thousand, five hundred fifty-seven".