8451668 has 12 divisors (see below), whose sum is σ = 14817012. Its totient is φ = 4218240.

The previous prime is 8451659. The next prime is 8451683. The reversal of 8451668 is 8661548.

It can be written as a sum of positive squares in 2 ways, for example, as 4008004 + 4443664 = 2002^2 + 2108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148 + ... + 4268.

It is an arithmetic number, because the mean of its divisors is an integer number (1234751).

Almost surely, 2^8451668 is an apocalyptic number.

It is an amenable number.

8451668 is a deficient number, since it is larger than the sum of its proper divisors (6365344).

8451668 is a wasteful number, since it uses less digits than its factorization.

8451668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802 (or 3800 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 8451668 is about 2907.1752613147. The cubic root of 8451668 is about 203.6952067649.

It can be divided in two parts, 8451 and 668, that added together give a palindrome (9119).

The spelling of 8451668 in words is "eight million, four hundred fifty-one thousand, six hundred sixty-eight".