2661607 has 8 divisors (see below), whose sum is σ = 2921184. Its totient is φ = 2409888.

The previous prime is 2661569. The next prime is 2661611. The reversal of 2661607 is 7061662.

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

It is not a de Polignac number, because 2661607 - 2¹⁵ = 2628839 is a prime.

It is a Duffinian number.

2661607 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661647) 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, 1243 + ... + 2620.

It is an arithmetic number, because the mean of its divisors is an integer number (365148).

2^2661607 is an apocalyptic number.

2661607 is a deficient number, since it is larger than the sum of its proper divisors (259577).

2661607 is a wasteful number, since it uses less digits than its factorization.

2661607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 2661607 is about 1631.4432261038. The cubic root of 2661607 is about 138.5844949190.

The spelling of 2661607 in words is "two million, six hundred sixty-one thousand, six hundred seven".