16661254220157 has 8 divisors (see below), whose sum is σ = 22224265747200. Its totient is φ = 11102872753280.

The previous prime is 16661254220153. The next prime is 16661254220159. The reversal of 16661254220157 is 75102245216661.

16661254220157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16661254220157 - 2² = 16661254220153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661254220153) 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, 1157506644 + ... + 1157521037.

It is an arithmetic number, because the mean of its divisors is an integer number (2778033218400).

Almost surely, 2^{16661254220157} is an apocalyptic number.

It is an amenable number.

16661254220157 is a deficient number, since it is larger than the sum of its proper divisors (5563011527043).

16661254220157 is a wasteful number, since it uses less digits than its factorization.

16661254220157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315030083.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 16661254220157 in words is "sixteen trillion, six hundred sixty-one billion, two hundred fifty-four million, two hundred twenty thousand, one hundred fifty-seven".