3077721661 has 8 divisors (see below), whose sum is σ = 3524996864. Its totient is φ = 2632346640.

The previous prime is 3077721649. The next prime is 3077721671. The reversal of 3077721661 is 1661277703.

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

It is not a de Polignac number, because 3077721661 - 2⁷ = 3077721533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3077721641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471570 + ... + 478051.

It is an arithmetic number, because the mean of its divisors is an integer number (440624608).

Almost surely, 2^3077721661 is an apocalyptic number.

It is an amenable number.

3077721661 is a deficient number, since it is larger than the sum of its proper divisors (447275203).

3077721661 is an equidigital number, since it uses as much as digits as its factorization.

3077721661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950091.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 3077721661 is about 55477.2174951124. The cubic root of 3077721661 is about 1454.5984273784.

The spelling of 3077721661 in words is "three billion, seventy-seven million, seven hundred twenty-one thousand, six hundred sixty-one".