8661423472 has 40 divisors (see below), whose sum is σ = 18153532544. Its totient is φ = 3979632384.

The previous prime is 8661423457. The next prime is 8661423473. The reversal of 8661423472 is 2743241668.

It is a super-2 number, since 2×8661423472² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661423473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46983 + ... + 139750.

Almost surely, 2^8661423472 is an apocalyptic number.

It is an amenable number.

8661423472 is an abundant number, since it is smaller than the sum of its proper divisors (9492109072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8661423472 is a wasteful number, since it uses less digits than its factorization.

8661423472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186977 (or 186971 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 8661423472 is about 93066.7688920164. The cubic root of 8661423472 is about 2053.6657371662.

The spelling of 8661423472 in words is "eight billion, six hundred sixty-one million, four hundred twenty-three thousand, four hundred seventy-two".