61667222889 has 8 divisors (see below), whose sum is σ = 82334229280. Its totient is φ = 41055849216.

The previous prime is 61667222861. The next prime is 61667222921. The reversal of 61667222889 is 98822276616.

It is a happy number.

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

It is not a de Polignac number, because 61667222889 - 2⁷ = 61667222761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61667222809) 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, 13905592 + ... + 13910025.

It is an arithmetic number, because the mean of its divisors is an integer number (10291778660).

Almost surely, 2^61667222889 is an apocalyptic number.

It is an amenable number.

61667222889 is a deficient number, since it is larger than the sum of its proper divisors (20667006391).

61667222889 is a wasteful number, since it uses less digits than its factorization.

61667222889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27816359.

The product of its digits is 6967296, while the sum is 57.

The spelling of 61667222889 in words is "sixty-one billion, six hundred sixty-seven million, two hundred twenty-two thousand, eight hundred eighty-nine".