187223073731666 has 32 divisors (see below), whose sum is σ = 328037107433472. Its totient is φ = 78485440637520.

The previous prime is 187223073731651. The next prime is 187223073731773. The reversal of 187223073731666 is 666137370322781.

It is a happy number.

It is a super-2 number, since 2×187223073731666² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 187223073731599 and 187223073731608.

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, 741421766 + ... + 741674241.

It is an arithmetic number, because the mean of its divisors is an integer number (10251159607296).

Almost surely, 2^{187223073731666} is an apocalyptic number.

187223073731666 is a deficient number, since it is larger than the sum of its proper divisors (140814033701806).

187223073731666 is a wasteful number, since it uses less digits than its factorization.

187223073731666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483096214.

The product of its (nonzero) digits is 64012032, while the sum is 62.

The spelling of 187223073731666 in words is "one hundred eighty-seven trillion, two hundred twenty-three billion, seventy-three million, seven hundred thirty-one thousand, six hundred sixty-six".