16662172501257 has 8 divisors (see below), whose sum is σ = 22265709357600. Its totient is φ = 11083375322880.

The previous prime is 16662172501241. The next prime is 16662172501267. The reversal of 16662172501257 is 75210527126661.

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

It is not a de Polignac number, because 16662172501257 - 2⁴ = 16662172501241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16662172501237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6184917919 + ... + 6184920612.

It is an arithmetic number, because the mean of its divisors is an integer number (2783213669700).

Almost surely, 2^{16662172501257} is an apocalyptic number.

It is an amenable number.

16662172501257 is a deficient number, since it is larger than the sum of its proper divisors (5603536856343).

16662172501257 is a wasteful number, since it uses less digits than its factorization.

16662172501257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12369838983.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 16662172501257 in words is "sixteen trillion, six hundred sixty-two billion, one hundred seventy-two million, five hundred one thousand, two hundred fifty-seven".