166260638 has 8 divisors (see below), whose sum is σ = 250145400. Its totient is φ = 82878840.

The previous prime is 166260631. The next prime is 166260649. The reversal of 166260638 is 836062661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166260631) 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, 124913 + ... + 126236.

It is an arithmetic number, because the mean of its divisors is an integer number (31268175).

Almost surely, 2^166260638 is an apocalyptic number.

166260638 is a deficient number, since it is larger than the sum of its proper divisors (83884762).

166260638 is a wasteful number, since it uses less digits than its factorization.

166260638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251482.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 166260638 is about 12894.2094755747. The cubic root of 166260638 is about 549.8739523821.

The spelling of 166260638 in words is "one hundred sixty-six million, two hundred sixty thousand, six hundred thirty-eight".