61667278343 has 16 divisors (see below), whose sum is σ = 67967446272. Its totient is φ = 55485648000.

The previous prime is 61667278339. The next prime is 61667278357. The reversal of 61667278343 is 34387276616.

It is a cyclic number.

It is not a de Polignac number, because 61667278343 - 2² = 61667278339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61664278343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360758 + ... + 503468.

It is an arithmetic number, because the mean of its divisors is an integer number (4247965392).

Almost surely, 2^61667278343 is an apocalyptic number.

61667278343 is a deficient number, since it is larger than the sum of its proper divisors (6300167929).

61667278343 is a wasteful number, since it uses less digits than its factorization.

61667278343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143126.

The product of its digits is 6096384, while the sum is 53.

The spelling of 61667278343 in words is "sixty-one billion, six hundred sixty-seven million, two hundred seventy-eight thousand, three hundred forty-three".