5158666 has 4 divisors (see below), whose sum is σ = 7738002. Its totient is φ = 2579332.

The previous prime is 5158663. The next prime is 5158669. The reversal of 5158666 is 6668515.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5158663) and next prime (5158669).

It can be written as a sum of positive squares in only one way, i.e., 5157441 + 1225 = 2271^2 + 35^2 .

It is a super-2 number, since 2×5158666² = 53223669799112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5158663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289665 + ... + 1289668.

Almost surely, 2^5158666 is an apocalyptic number.

5158666 is a deficient number, since it is larger than the sum of its proper divisors (2579336).

5158666 is a wasteful number, since it uses less digits than its factorization.

5158666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579335.

The product of its digits is 43200, while the sum is 37.

The square root of 5158666 is about 2271.2696889625. The cubic root of 5158666 is about 172.7875592967.

The spelling of 5158666 in words is "five million, one hundred fifty-eight thousand, six hundred sixty-six".