2661506606 has 8 divisors (see below), whose sum is σ = 4355192664. Its totient is φ = 1209775720.

The previous prime is 2661506599. The next prime is 2661506633. The reversal of 2661506606 is 6066051662.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2661506606.

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, 60488765 + ... + 60488808.

It is an arithmetic number, because the mean of its divisors is an integer number (544399083).

Almost surely, 2^2661506606 is an apocalyptic number.

2661506606 is a deficient number, since it is larger than the sum of its proper divisors (1693686058).

2661506606 is a wasteful number, since it uses less digits than its factorization.

2661506606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120977586.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 2661506606 is about 51589.7916840144. The cubic root of 2661506606 is about 1385.8275245956.

The spelling of 2661506606 in words is "two billion, six hundred sixty-one million, five hundred six thousand, six hundred six".