52166665 has 8 divisors (see below), whose sum is σ = 62657280. Its totient is φ = 41695152.

The previous prime is 52166657. The next prime is 52166671. The reversal of 52166665 is 56666125.

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 52166665 - 2³ = 52166657 is a prime.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2152 + ... + 10438.

It is an arithmetic number, because the mean of its divisors is an integer number (7832160).

Almost surely, 2^52166665 is an apocalyptic number.

It is an amenable number.

52166665 is a deficient number, since it is larger than the sum of its proper divisors (10490615).

52166665 is a wasteful number, since it uses less digits than its factorization.

52166665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9551.

The product of its digits is 64800, while the sum is 37.

The square root of 52166665 is about 7222.6494446290. The cubic root of 52166665 is about 373.6494589799.

It can be divided in two parts, 521666 and 65, that added together give a triangular number (521731 = T₁₀₂₁).

The spelling of 52166665 in words is "fifty-two million, one hundred sixty-six thousand, six hundred sixty-five".