166252478 has 8 divisors (see below), whose sum is σ = 285004272. Its totient is φ = 71251056.

The previous prime is 166252477. The next prime is 166252483. The reversal of 166252478 is 874252661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×166252478³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166252477) 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, 5937575 + ... + 5937602.

It is an arithmetic number, because the mean of its divisors is an integer number (35625534).

Almost surely, 2^166252478 is an apocalyptic number.

166252478 is a deficient number, since it is larger than the sum of its proper divisors (118751794).

166252478 is a wasteful number, since it uses less digits than its factorization.

166252478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11875186.

The product of its digits is 161280, while the sum is 41.

The square root of 166252478 is about 12893.8930505879. The cubic root of 166252478 is about 549.8649563766.

The spelling of 166252478 in words is "one hundred sixty-six million, two hundred fifty-two thousand, four hundred seventy-eight".