8621437966 has 4 divisors (see below), whose sum is σ = 12932156952. Its totient is φ = 4310718982.

The previous prime is 8621437963. The next prime is 8621437999. The reversal of 8621437966 is 6697341268.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8621437963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2155359490 + ... + 2155359493.

It is an arithmetic number, because the mean of its divisors is an integer number (3233039238).

Almost surely, 2^8621437966 is an apocalyptic number.

8621437966 is a deficient number, since it is larger than the sum of its proper divisors (4310718986).

8621437966 is a wasteful number, since it uses less digits than its factorization.

8621437966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310718985.

The product of its digits is 2612736, while the sum is 52.

The square root of 8621437966 is about 92851.6987782130. The cubic root of 8621437966 is about 2050.5006087352.

The spelling of 8621437966 in words is "eight billion, six hundred twenty-one million, four hundred thirty-seven thousand, nine hundred sixty-six".