661062523 has 8 divisors (see below), whose sum is σ = 731038896. Its totient is φ = 592732800.

The previous prime is 661062517. The next prime is 661062529. The reversal of 661062523 is 325260166.

It is an interprime number because it is at equal distance from previous prime (661062517) and next prime (661062529).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-661062523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661062529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410818 + ... + 412423.

It is an arithmetic number, because the mean of its divisors is an integer number (91379862).

Almost surely, 2^661062523 is an apocalyptic number.

661062523 is a deficient number, since it is larger than the sum of its proper divisors (69976373).

661062523 is a wasteful number, since it uses less digits than its factorization.

661062523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823325.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 661062523 is about 25711.1361670386. The cubic root of 661062523 is about 871.1257382988.

The spelling of 661062523 in words is "six hundred sixty-one million, sixty-two thousand, five hundred twenty-three".