660622642 has 8 divisors (see below), whose sum is σ = 1017716076. Its totient is φ = 321383952.

The previous prime is 660622621. The next prime is 660622649. The reversal of 660622642 is 246226066.

It can be written as a sum of positive squares in 2 ways, for example, as 660438601 + 184041 = 25699^2 + 429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 660622598 and 660622607.

It is not an unprimeable number, because it can be changed into a prime (660622649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4463593 + ... + 4463740.

Almost surely, 2^660622642 is an apocalyptic number.

660622642 is a deficient number, since it is larger than the sum of its proper divisors (357093434).

660622642 is a wasteful number, since it uses less digits than its factorization.

660622642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8927372.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 660622642 is about 25702.5804541101. The cubic root of 660622642 is about 870.9324753457.

The spelling of 660622642 in words is "six hundred sixty million, six hundred twenty-two thousand, six hundred forty-two".