61656730 has 8 divisors (see below), whose sum is σ = 110982132. Its totient is φ = 24662688.

The previous prime is 61656701. The next prime is 61656731. The reversal of 61656730 is 3765616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50225569 + 11431161 = 7087^2 + 3381^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61656731) 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, 3082827 + ... + 3082846.

Almost surely, 2^61656730 is an apocalyptic number.

61656730 is a deficient number, since it is larger than the sum of its proper divisors (49325402).

61656730 is a wasteful number, since it uses less digits than its factorization.

61656730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6165680.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 61656730 is about 7852.1799520897. The cubic root of 61656730 is about 395.0573649528.

The spelling of 61656730 in words is "sixty-one million, six hundred fifty-six thousand, seven hundred thirty".