161616150051666 has 32 divisors (see below), whose sum is σ = 340322618938560. Its totient is φ = 51024965086656.

The previous prime is 161616150051623. The next prime is 161616150051691. The reversal of 161616150051666 is 666150051616161.

It is a super-2 number, since 2×161616150051666² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162193861 + ... + 163187256.

It is an arithmetic number, because the mean of its divisors is an integer number (10635081841830).

Almost surely, 2^{161616150051666} is an apocalyptic number.

161616150051666 is an abundant number, since it is smaller than the sum of its proper divisors (178706468886894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161616150051666 is a wasteful number, since it uses less digits than its factorization.

161616150051666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325385498.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 161616150051666 in words is "one hundred sixty-one trillion, six hundred sixteen billion, one hundred fifty million, fifty-one thousand, six hundred sixty-six".