661852345 has 32 divisors (see below), whose sum is σ = 1013253120. Its totient is φ = 402978240.

The previous prime is 661852339. The next prime is 661852361. The reversal of 661852345 is 543258166.

661852345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 661852345 - 2¹¹ = 661850297 is a prime.

It is a super-3 number, since 3×661852345³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 661852298 and 661852307.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3435 + ... + 36544.

It is an arithmetic number, because the mean of its divisors is an integer number (31664160).

Almost surely, 2^661852345 is an apocalyptic number.

It is an amenable number.

661852345 is a deficient number, since it is larger than the sum of its proper divisors (351400775).

661852345 is a wasteful number, since it uses less digits than its factorization.

661852345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40045.

The product of its digits is 172800, while the sum is 40.

The square root of 661852345 is about 25726.4911132474. The cubic root of 661852345 is about 871.4725337556.

The spelling of 661852345 in words is "six hundred sixty-one million, eight hundred fifty-two thousand, three hundred forty-five".