660601611 has 6 divisors (see below), whose sum is σ = 954202340. Its totient is φ = 440401068.

The previous prime is 660601463. The next prime is 660601639. The reversal of 660601611 is 116106066.

It is not a de Polignac number, because 660601611 - 2²⁶ = 593492747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660601651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36700081 + ... + 36700098.

Almost surely, 2^660601611 is an apocalyptic number.

660601611 is a deficient number, since it is larger than the sum of its proper divisors (293600729).

660601611 is a wasteful number, since it uses less digits than its factorization.

660601611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73400185 (or 73400182 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 660601611 is about 25702.1713285084. The cubic root of 660601611 is about 870.9232331681.

Adding to 660601611 its reverse (116106066), we get a palindrome (776707677).

The spelling of 660601611 in words is "six hundred sixty million, six hundred one thousand, six hundred eleven".