6617948578 has 24 divisors (see below), whose sum is σ = 10122754572. Its totient is φ = 3244442112.

The previous prime is 6617948573. The next prime is 6617948627. The reversal of 6617948578 is 8758497166.

It can be written as a sum of positive squares in 2 ways, for example, as 6615707569 + 2241009 = 81337^2 + 1497^2 .

Its product of digits (20321280) is a multiple of the sum of its prime divisors (735).

It is not an unprimeable number, because it can be changed into a prime (6617948573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13262173 + ... + 13262671.

Almost surely, 2^6617948578 is an apocalyptic number.

6617948578 is a deficient number, since it is larger than the sum of its proper divisors (3504805994).

6617948578 is an equidigital number, since it uses as much as digits as its factorization.

6617948578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 735 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 61.

The square root of 6617948578 is about 81350.7749071882. The cubic root of 6617948578 is about 1877.4762970123.

The spelling of 6617948578 in words is "six billion, six hundred seventeen million, nine hundred forty-eight thousand, five hundred seventy-eight".