61668701266 has 8 divisors (see below), whose sum is σ = 92515380300. Its totient is φ = 30830241168.

The previous prime is 61668701257. The next prime is 61668701267. The reversal of 61668701266 is 66210786616.

It can be written as a sum of positive squares in 2 ways, for example, as 61171634241 + 497067025 = 247329^2 + 22295^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61668701267) 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, 2035941 + ... + 2066008.

Almost surely, 2^61668701266 is an apocalyptic number.

61668701266 is a deficient number, since it is larger than the sum of its proper divisors (30846679034).

61668701266 is a wasteful number, since it uses less digits than its factorization.

61668701266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109468.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 61668701266 in words is "sixty-one billion, six hundred sixty-eight million, seven hundred one thousand, two hundred sixty-six".