2661319 has 6 divisors (see below), whose sum is σ = 2756576. Its totient is φ = 2566680.

The previous prime is 2661317. The next prime is 2661331. The reversal of 2661319 is 9131662.

It is not a de Polignac number, because 2661319 - 2¹ = 2661317 is a prime.

It is a super-2 number, since 2×2661319² = 14165237639522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (1944) is a multiple of the sum of its prime divisors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661317) 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, 8937 + ... + 9229.

2^2661319 is an apocalyptic number.

2661319 is a deficient number, since it is larger than the sum of its proper divisors (95257).

2661319 is an frugal number, since it uses more digits than its factorization.

2661319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 324 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 2661319 is about 1631.3549583092. The cubic root of 2661319 is about 138.5794962128.

The spelling of 2661319 in words is "two million, six hundred sixty-one thousand, three hundred nineteen".