16656045121 has 8 divisors (see below), whose sum is σ = 16690238784. Its totient is φ = 16621885680.

The previous prime is 16656045101. The next prime is 16656045151. The reversal of 16656045121 is 12154065661.

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 16656045121 - 2¹⁷ = 16655914049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16656045101) 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, 1111086 + ... + 1125976.

It is an arithmetic number, because the mean of its divisors is an integer number (2086279848).

Almost surely, 2^16656045121 is an apocalyptic number.

It is an amenable number.

16656045121 is a deficient number, since it is larger than the sum of its proper divisors (34193663).

16656045121 is a wasteful number, since it uses less digits than its factorization.

16656045121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17111.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 16656045121 in words is "sixteen billion, six hundred fifty-six million, forty-five thousand, one hundred twenty-one".