3019640661 has 8 divisors (see below), whose sum is σ = 4473541760. Its totient is φ = 2013093756.

The previous prime is 3019640651. The next prime is 3019640681. The reversal of 3019640661 is 1660469103.

3019640661 is a `hidden beast` number, since 3 + 0 + 1 + 9 + 640 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 3019640661 - 2¹⁷ = 3019509589 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 (3019640651) 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, 55919245 + ... + 55919298.

It is an arithmetic number, because the mean of its divisors is an integer number (559192720).

Almost surely, 2^3019640661 is an apocalyptic number.

It is an amenable number.

3019640661 is a deficient number, since it is larger than the sum of its proper divisors (1453901099).

3019640661 is a wasteful number, since it uses less digits than its factorization.

3019640661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111838552 (or 111838546 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3019640661 is about 54951.2571375760. The cubic root of 3019640661 is about 1445.3901415785.

The spelling of 3019640661 in words is "three billion, nineteen million, six hundred forty thousand, six hundred sixty-one".