668127652 has 24 divisors (see below), whose sum is σ = 1177457400. Its totient is φ = 331719936.

The previous prime is 668127643. The next prime is 668127661. The reversal of 668127652 is 256721866.

668127652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668127643) and next prime (668127661).

It can be written as a sum of positive squares in 4 ways, for example, as 474194176 + 193933476 = 21776^2 + 13926^2 .

It is a junction number, because it is equal to n+sod(n) for n = 668127599 and 668127608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465528 + ... + 466960.

It is an arithmetic number, because the mean of its divisors is an integer number (49060725).

Almost surely, 2^668127652 is an apocalyptic number.

It is an amenable number.

668127652 is a deficient number, since it is larger than the sum of its proper divisors (509329748).

668127652 is a wasteful number, since it uses less digits than its factorization.

668127652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175 (or 2173 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 668127652 is about 25848.1653507556. The cubic root of 668127652 is about 874.2181432666.

The spelling of 668127652 in words is "six hundred sixty-eight million, one hundred twenty-seven thousand, six hundred fifty-two".