61740740 has 24 divisors (see below), whose sum is σ = 135293760. Its totient is φ = 23622368.

The previous prime is 61740737. The next prime is 61740743. The reversal of 61740740 is 4704716.

It is a happy number.

61740740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61740737) and next prime (61740743).

It is not an unprimeable number, because it can be changed into a prime (61740743) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 66650 + ... + 67569.

It is an arithmetic number, because the mean of its divisors is an integer number (5637240).

Almost surely, 2^61740740 is an apocalyptic number.

It is an amenable number.

61740740 is an abundant number, since it is smaller than the sum of its proper divisors (73553020).

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

61740740 is a wasteful number, since it uses less digits than its factorization.

61740740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134251 (or 134249 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 61740740 is about 7857.5276009697. The cubic root of 61740740 is about 395.2367111864.

The spelling of 61740740 in words is "sixty-one million, seven hundred forty thousand, seven hundred forty".