61916665 has 8 divisors (see below), whose sum is σ = 75559680. Its totient is φ = 48693552.

The previous prime is 61916639. The next prime is 61916707. The reversal of 61916665 is 56661916.

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

It is a cyclic number.

It is not a de Polignac number, because 61916665 - 2¹¹ = 61914617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104649 + ... + 105238.

It is an arithmetic number, because the mean of its divisors is an integer number (9444960).

Almost surely, 2^61916665 is an apocalyptic number.

It is an amenable number.

61916665 is a deficient number, since it is larger than the sum of its proper divisors (13643015).

61916665 is a wasteful number, since it uses less digits than its factorization.

61916665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209951.

The product of its digits is 58320, while the sum is 40.

The square root of 61916665 is about 7868.7143168373. The cubic root of 61916665 is about 395.6117530194.

The spelling of 61916665 in words is "sixty-one million, nine hundred sixteen thousand, six hundred sixty-five".