2606662509 has 16 divisors (see below), whose sum is σ = 3828324864. Its totient is φ = 1564455600.

The previous prime is 2606662501. The next prime is 2606662567. The reversal of 2606662509 is 9052666062.

It is not a de Polignac number, because 2606662509 - 2³ = 2606662501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2606662501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380047 + ... + 386844.

It is an arithmetic number, because the mean of its divisors is an integer number (239270304).

Almost surely, 2^2606662509 is an apocalyptic number.

It is an amenable number.

2606662509 is a deficient number, since it is larger than the sum of its proper divisors (1221662355).

2606662509 is a wasteful number, since it uses less digits than its factorization.

2606662509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767008.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 2606662509 is about 51055.4846123313. The cubic root of 2606662509 is about 1376.2424048233.

It can be divided in two parts, 260666 and 2509, that added together give a triangular number (263175 = T₇₂₅).

The spelling of 2606662509 in words is "two billion, six hundred six million, six hundred sixty-two thousand, five hundred nine".