661807348 has 48 divisors (see below), whose sum is σ = 1247826384. Its totient is φ = 306022400.

The previous prime is 661807327. The next prime is 661807351. The reversal of 661807348 is 843708166.

661807348 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 119290084 + 542517264 = 10922^2 + 23292^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1187886 + ... + 1188442.

It is an arithmetic number, because the mean of its divisors is an integer number (25996383).

Almost surely, 2^661807348 is an apocalyptic number.

661807348 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

661807348 is a deficient number, since it is larger than the sum of its proper divisors (586019036).

661807348 is a wasteful number, since it uses less digits than its factorization.

661807348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 661807348 is about 25725.6165718142. The cubic root of 661807348 is about 871.4527838629.

The spelling of 661807348 in words is "six hundred sixty-one million, eight hundred seven thousand, three hundred forty-eight".