660616145 has 8 divisors (see below), whose sum is σ = 905987904. Its totient is φ = 452993904.

The previous prime is 660616123. The next prime is 660616157. The reversal of 660616145 is 541616066.

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 660616145 - 2¹⁶ = 660550609 is a prime.

It is a super-2 number, since 2×660616145² = 872827382069322050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 18874747 = 660616145 / (6 + 6 + 0 + 6 + 1 + 6 + 1 + 4 + 5).

It is a Duffinian number.

It is a Curzon number.

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, 9437339 + ... + 9437408.

It is an arithmetic number, because the mean of its divisors is an integer number (113248488).

Almost surely, 2^660616145 is an apocalyptic number.

It is an amenable number.

660616145 is a deficient number, since it is larger than the sum of its proper divisors (245371759).

660616145 is a wasteful number, since it uses less digits than its factorization.

660616145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18874759.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 660616145 is about 25702.4540657113. The cubic root of 660616145 is about 870.9296202276.

The spelling of 660616145 in words is "six hundred sixty million, six hundred sixteen thousand, one hundred forty-five".