73661661763 has 4 divisors (see below), whose sum is σ = 74130844480. Its totient is φ = 73192479048.

The previous prime is 73661661739. The next prime is 73661661779. The reversal of 73661661763 is 36716616637.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73661661763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73661661763.

It is not an unprimeable number, because it can be changed into a prime (73661664763) 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, 234591123 + ... + 234591436.

It is an arithmetic number, because the mean of its divisors is an integer number (18532711120).

Almost surely, 2^73661661763 is an apocalyptic number.

73661661763 is a deficient number, since it is larger than the sum of its proper divisors (469182717).

73661661763 is a wasteful number, since it uses less digits than its factorization.

73661661763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469182716.

The product of its digits is 3429216, while the sum is 52.

The spelling of 73661661763 in words is "seventy-three billion, six hundred sixty-one million, six hundred sixty-one thousand, seven hundred sixty-three".