5112161666 has 4 divisors (see below), whose sum is σ = 7668242502. Its totient is φ = 2556080832.

The previous prime is 5112161617. The next prime is 5112161689. The reversal of 5112161666 is 6661612115.

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., 3991586041 + 1120575625 = 63179^2 + 33475^2 .

It is a super-2 number, since 2×5112161666² = 52268393798639791112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278040415 + ... + 1278040418.

Almost surely, 2^5112161666 is an apocalyptic number.

5112161666 is a deficient number, since it is larger than the sum of its proper divisors (2556080836).

5112161666 is a wasteful number, since it uses less digits than its factorization.

5112161666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556080835.

The product of its digits is 12960, while the sum is 35.

The square root of 5112161666 is about 71499.3822770519. The cubic root of 5112161666 is about 1722.6677622503.

The spelling of 5112161666 in words is "five billion, one hundred twelve million, one hundred sixty-one thousand, six hundred sixty-six".