3722777666 has 8 divisors (see below), whose sum is σ = 5600737740. Its totient is φ = 1855865088.

The previous prime is 3722777651. The next prime is 3722777671. The reversal of 3722777666 is 6667772273.

It can be written as a sum of positive squares in 2 ways, for example, as 2891320441 + 831457225 = 53771^2 + 28835^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2761031 + ... + 2762378.

Almost surely, 2^3722777666 is an apocalyptic number.

3722777666 is a deficient number, since it is larger than the sum of its proper divisors (1877960074).

3722777666 is a wasteful number, since it uses less digits than its factorization.

3722777666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5523748.

The product of its digits is 6223392, while the sum is 53.

The square root of 3722777666 is about 61014.5692929156. The cubic root of 3722777666 is about 1549.8477361355.

The spelling of 3722777666 in words is "three billion, seven hundred twenty-two million, seven hundred seventy-seven thousand, six hundred sixty-six".