54166687 has 4 divisors (see below), whose sum is σ = 54312280. Its totient is φ = 54021096.

The previous prime is 54166669. The next prime is 54166711. The reversal of 54166687 is 78666145.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78666145 = 5 ⋅15733229.

It is a cyclic number.

It is not a de Polignac number, because 54166687 - 2¹⁹ = 53642399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54166087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72237 + ... + 72982.

It is an arithmetic number, because the mean of its divisors is an integer number (13578070).

Almost surely, 2^54166687 is an apocalyptic number.

54166687 is a deficient number, since it is larger than the sum of its proper divisors (145593).

54166687 is a wasteful number, since it uses less digits than its factorization.

54166687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145592.

The product of its digits is 241920, while the sum is 43.

The square root of 54166687 is about 7359.8021033177. The cubic root of 54166687 is about 378.3648274523.

The spelling of 54166687 in words is "fifty-four million, one hundred sixty-six thousand, six hundred eighty-seven".