61670666853 has 6 divisors (see below), whose sum is σ = 89079852134. Its totient is φ = 41113777896.

The previous prime is 61670666833. The next prime is 61670666873. The reversal of 61670666853 is 35866607616.

It is an interprime number because it is at equal distance from previous prime (61670666833) and next prime (61670666873).

It can be written as a sum of positive squares in only one way, i.e., 42515553249 + 19155113604 = 206193^2 + 138402^2 .

It is not a de Polignac number, because 61670666853 - 2⁹ = 61670666341 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 61670666853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61670666833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3426148150 + ... + 3426148167.

Almost surely, 2^61670666853 is an apocalyptic number.

It is an amenable number.

61670666853 is a deficient number, since it is larger than the sum of its proper divisors (27409185281).

61670666853 is a wasteful number, since it uses less digits than its factorization.

61670666853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852296323 (or 6852296320 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 61670666853 in words is "sixty-one billion, six hundred seventy million, six hundred sixty-six thousand, eight hundred fifty-three".