61740305 has 8 divisors (see below), whose sum is σ = 80823744. Its totient is φ = 44902000.

The previous prime is 61740293. The next prime is 61740307. The reversal of 61740305 is 50304716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61740305 - 2⁶ = 61740241 is a prime.

It is a super-2 number, since 2×61740305² = 7623730522986050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61740307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561221 + ... + 561330.

It is an arithmetic number, because the mean of its divisors is an integer number (10102968).

Almost surely, 2^61740305 is an apocalyptic number.

It is an amenable number.

61740305 is a deficient number, since it is larger than the sum of its proper divisors (19083439).

61740305 is a wasteful number, since it uses less digits than its factorization.

61740305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122567.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 61740305 is about 7857.4999204582. The cubic root of 61740305 is about 395.2357829589.

The spelling of 61740305 in words is "sixty-one million, seven hundred forty thousand, three hundred five".