61071660 has 72 divisors (see below), whose sum is σ = 199508400. Its totient is φ = 15032448.

The previous prime is 61071623. The next prime is 61071671. The reversal of 61071660 is 6617016.

61071660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10710 + ... + 15389.

It is an arithmetic number, because the mean of its divisors is an integer number (2770950).

Almost surely, 2^61071660 is an apocalyptic number.

61071660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61071660 is an abundant number, since it is smaller than the sum of its proper divisors (138436740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61071660 is a wasteful number, since it uses less digits than its factorization.

61071660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26127 (or 26122 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 61071660 is about 7814.8358907913. The cubic root of 61071660 is about 393.8038051945.

Adding to 61071660 its reverse (6617016), we get a palindrome (67688676).

The spelling of 61071660 in words is "sixty-one million, seventy-one thousand, six hundred sixty".