661373848 has 64 divisors (see below), whose sum is σ = 1354890240. Its totient is φ = 301453824.

The previous prime is 661373833. The next prime is 661373849. The reversal of 661373848 is 848373166.

It is a junction number, because it is equal to n+sod(n) for n = 661373798 and 661373807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661373849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683461 + ... + 684427.

It is an arithmetic number, because the mean of its divisors is an integer number (21170160).

Almost surely, 2^661373848 is an apocalyptic number.

661373848 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

661373848 is an abundant number, since it is smaller than the sum of its proper divisors (693516392).

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

661373848 is a wasteful number, since it uses less digits than its factorization.

661373848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1140 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The square root of 661373848 is about 25717.1897376055. The cubic root of 661373848 is about 871.2624680069.

The spelling of 661373848 in words is "six hundred sixty-one million, three hundred seventy-three thousand, eight hundred forty-eight".