216666560151 has 8 divisors (see below), whose sum is σ = 320987496560. Its totient is φ = 144444373416.

The previous prime is 216666560093. The next prime is 216666560261. The reversal of 216666560151 is 151065666612.

It is not a de Polignac number, because 216666560151 - 2²¹ = 216664462999 is a prime.

It is a super-2 number, since 2×216666560151² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216666560097 and 216666560106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216666564151) 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, 4012343680 + ... + 4012343733.

It is an arithmetic number, because the mean of its divisors is an integer number (40123437070).

Almost surely, 2^216666560151 is an apocalyptic number.

216666560151 is a deficient number, since it is larger than the sum of its proper divisors (104320936409).

216666560151 is an equidigital number, since it uses as much as digits as its factorization.

216666560151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8024687422 (or 8024687416 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 216666560151 in words is "two hundred sixteen billion, six hundred sixty-six million, five hundred sixty thousand, one hundred fifty-one".