3380821778 has 4 divisors (see below), whose sum is σ = 5071232670. Its totient is φ = 1690410888.

The previous prime is 3380821733. The next prime is 3380821793. The reversal of 3380821778 is 8771280833.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 3288219649 + 92602129 = 57343^2 + 9623^2 .

It is a super-2 number, since 2×3380821778² = 22859911789198162568, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845205443 + ... + 845205446.

Almost surely, 2^3380821778 is an apocalyptic number.

3380821778 is a deficient number, since it is larger than the sum of its proper divisors (1690410892).

3380821778 is a wasteful number, since it uses less digits than its factorization.

3380821778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690410891.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 3380821778 is about 58144.8344911223. The cubic root of 3380821778 is about 1500.8619901834.

The spelling of 3380821778 in words is "three billion, three hundred eighty million, eight hundred twenty-one thousand, seven hundred seventy-eight".