8261195905966 has 8 divisors (see below), whose sum is σ = 12403930780584. Its totient is φ = 4126552312440.

The previous prime is 8261195905867. The next prime is 8261195905969. The reversal of 8261195905966 is 6695095911628.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8261195905969) 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, 2022817720 + ... + 2022821803.

It is an arithmetic number, because the mean of its divisors is an integer number (1550491347573).

Almost surely, 2^{8261195905966} is an apocalyptic number.

8261195905966 is a deficient number, since it is larger than the sum of its proper divisors (4142734874618).

8261195905966 is a wasteful number, since it uses less digits than its factorization.

8261195905966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4045640546.

The product of its (nonzero) digits is 62985600, while the sum is 67.

The spelling of 8261195905966 in words is "eight trillion, two hundred sixty-one billion, one hundred ninety-five million, nine hundred five thousand, nine hundred sixty-six".