5142261666 has 16 divisors (see below), whose sum is σ = 10318027104. Its totient is φ = 1708503264.

The previous prime is 5142261661. The next prime is 5142261667. The reversal of 5142261666 is 6661622415.

It is a super-2 number, since 2×5142261666² = 52885710083226191112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5142261661) 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, 1393995 + ... + 1397678.

It is an arithmetic number, because the mean of its divisors is an integer number (644876694).

Almost surely, 2^5142261666 is an apocalyptic number.

5142261666 is an abundant number, since it is smaller than the sum of its proper divisors (5175765438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5142261666 is a wasteful number, since it uses less digits than its factorization.

5142261666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791985.

The product of its digits is 103680, while the sum is 39.

The square root of 5142261666 is about 71709.5646758506. The cubic root of 5142261666 is about 1726.0421250092.

The spelling of 5142261666 in words is "five billion, one hundred forty-two million, two hundred sixty-one thousand, six hundred sixty-six".