3165720061 has 4 divisors (see below), whose sum is σ = 3617965792. Its totient is φ = 2713474332.

The previous prime is 3165720053. The next prime is 3165720067. The reversal of 3165720061 is 1600275613.

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: 1600275613 = 101 ⋅15844313.

It is a cyclic number.

It is not a de Polignac number, because 3165720061 - 2³ = 3165720053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3165720067) 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 3 ways as a sum of consecutive naturals, for example, 226122855 + ... + 226122868.

It is an arithmetic number, because the mean of its divisors is an integer number (904491448).

Almost surely, 2^3165720061 is an apocalyptic number.

It is an amenable number.

3165720061 is a deficient number, since it is larger than the sum of its proper divisors (452245731).

3165720061 is an equidigital number, since it uses as much as digits as its factorization.

3165720061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452245730.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 3165720061 is about 56264.7319463978. The cubic root of 3165720061 is about 1468.3316814520.

Adding to 3165720061 its reverse (1600275613), we get a palindrome (4765995674).

The spelling of 3165720061 in words is "three billion, one hundred sixty-five million, seven hundred twenty thousand, sixty-one".