2661087694 has 4 divisors (see below), whose sum is σ = 3991631544. Its totient is φ = 1330543846.

The previous prime is 2661087683. The next prime is 2661087713. The reversal of 2661087694 is 4967801662.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665271922 + ... + 665271925.

It is an arithmetic number, because the mean of its divisors is an integer number (997907886).

Almost surely, 2^2661087694 is an apocalyptic number.

2661087694 is a deficient number, since it is larger than the sum of its proper divisors (1330543850).

2661087694 is a wasteful number, since it uses less digits than its factorization.

2661087694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330543849.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 2661087694 is about 51585.7314962190. The cubic root of 2661087694 is about 1385.7548126161.

The spelling of 2661087694 in words is "two billion, six hundred sixty-one million, eighty-seven thousand, six hundred ninety-four".