661016595 has 8 divisors (see below), whose sum is σ = 1057626576. Its totient is φ = 352542176.

The previous prime is 661016579. The next prime is 661016623. The reversal of 661016595 is 595610166.

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

It is a cyclic number.

It is not a de Polignac number, because 661016595 - 2⁴ = 661016579 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22033872 + ... + 22033901.

It is an arithmetic number, because the mean of its divisors is an integer number (132203322).

Almost surely, 2^661016595 is an apocalyptic number.

661016595 is a deficient number, since it is larger than the sum of its proper divisors (396609981).

661016595 is a wasteful number, since it uses less digits than its factorization.

661016595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44067781.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 661016595 is about 25710.2429976848. The cubic root of 661016595 is about 871.1055637121.

The spelling of 661016595 in words is "six hundred sixty-one million, sixteen thousand, five hundred ninety-five".