3420504661 has 4 divisors (see below), whose sum is σ = 3909148192. Its totient is φ = 2931861132.

The previous prime is 3420504641. The next prime is 3420504671. The reversal of 3420504661 is 1664050243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1664050243 = 463 ⋅3594061.

It is a cyclic number.

It is not a de Polignac number, because 3420504661 - 2¹⁷ = 3420373589 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 (3420504611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244321755 + ... + 244321768.

It is an arithmetic number, because the mean of its divisors is an integer number (977287048).

Almost surely, 2^3420504661 is an apocalyptic number.

It is an amenable number.

3420504661 is a deficient number, since it is larger than the sum of its proper divisors (488643531).

3420504661 is an equidigital number, since it uses as much as digits as its factorization.

3420504661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488643530.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 3420504661 is about 58485.0806702017. The cubic root of 3420504661 is about 1506.7113582550.

The spelling of 3420504661 in words is "three billion, four hundred twenty million, five hundred four thousand, six hundred sixty-one".