2661771662 has 32 divisors (see below), whose sum is σ = 4511130624. Its totient is φ = 1166961600.

The previous prime is 2661771649. The next prime is 2661771691.

2661771662 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203018 + ... + 215730.

It is an arithmetic number, because the mean of its divisors is an integer number (140972832).

Almost surely, 2^2661771662 is an apocalyptic number.

2661771662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2661771662 is a deficient number, since it is larger than the sum of its proper divisors (1849358962).

2661771662 is a wasteful number, since it uses less digits than its factorization.

2661771662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13064.

The product of its digits is 254016, while the sum is 44.

The square root of 2661771662 is about 51592.3605003687. The cubic root of 2661771662 is about 1385.8735273253.

The spelling of 2661771662 in words is "two billion, six hundred sixty-one million, seven hundred seventy-one thousand, six hundred sixty-two".