61719667 has 4 divisors (see below), whose sum is σ = 63710656. Its totient is φ = 59728680.

The previous prime is 61719659. The next prime is 61719677. The reversal of 61719667 is 76691716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61719667 - 2³ = 61719659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61719677) 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, 995448 + ... + 995509.

It is an arithmetic number, because the mean of its divisors is an integer number (15927664).

Almost surely, 2^61719667 is an apocalyptic number.

61719667 is a deficient number, since it is larger than the sum of its proper divisors (1990989).

61719667 is a wasteful number, since it uses less digits than its factorization.

61719667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990988.

The product of its digits is 95256, while the sum is 43.

The square root of 61719667 is about 7856.1865431009. The cubic root of 61719667 is about 395.1917394170.

The spelling of 61719667 in words is "sixty-one million, seven hundred nineteen thousand, six hundred sixty-seven".