3861867022661 has 4 divisors (see below), whose sum is σ = 3874284601824. Its totient is φ = 3849449443500.

The previous prime is 3861867022583. The next prime is 3861867022687. The reversal of 3861867022661 is 1662207681683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3861867022661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3861867022597 and 3861867022606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861867042661) 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, 6208789115 + ... + 6208789736.

It is an arithmetic number, because the mean of its divisors is an integer number (968571150456).

Almost surely, 2^{3861867022661} is an apocalyptic number.

It is an amenable number.

3861867022661 is a deficient number, since it is larger than the sum of its proper divisors (12417579163).

3861867022661 is a wasteful number, since it uses less digits than its factorization.

3861867022661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12417579162.

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 3861867022661 in words is "three trillion, eight hundred sixty-one billion, eight hundred sixty-seven million, twenty-two thousand, six hundred sixty-one".