61166678389 has 8 divisors (see below), whose sum is σ = 61438545792. Its totient is φ = 60894891360.

The previous prime is 61166678387. The next prime is 61166678393. The reversal of 61166678389 is 98387666116.

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 61166678389 - 2¹ = 61166678387 is a prime.

It is a super-3 number, since 3×61166678389³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166678387) 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, 1915972 + ... + 1947634.

It is an arithmetic number, because the mean of its divisors is an integer number (7679818224).

Almost surely, 2^61166678389 is an apocalyptic number.

It is an amenable number.

61166678389 is a deficient number, since it is larger than the sum of its proper divisors (271867403).

61166678389 is a wasteful number, since it uses less digits than its factorization.

61166678389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40187.

The product of its digits is 15676416, while the sum is 61.

The spelling of 61166678389 in words is "sixty-one billion, one hundred sixty-six million, six hundred seventy-eight thousand, three hundred eighty-nine".