660106705 has 8 divisors (see below), whose sum is σ = 793415592. Its totient is φ = 527227008.

The previous prime is 660106703. The next prime is 660106747. The reversal of 660106705 is 507601066.

It can be written as a sum of positive squares in 4 ways, for example, as 80838081 + 579268624 = 8991^2 + 24068^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 660106705 - 2¹ = 660106703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660106703) 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, 103902 + ... + 110071.

It is an arithmetic number, because the mean of its divisors is an integer number (99176949).

Almost surely, 2^660106705 is an apocalyptic number.

It is an amenable number.

660106705 is a deficient number, since it is larger than the sum of its proper divisors (133308887).

660106705 is a wasteful number, since it uses less digits than its factorization.

660106705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214595.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 660106705 is about 25692.5418166440. The cubic root of 660106705 is about 870.7056876212.

The spelling of 660106705 in words is "six hundred sixty million, one hundred six thousand, seven hundred five".