661427662 has 16 divisors (see below), whose sum is σ = 1161532512. Its totient is φ = 276554880.

The previous prime is 661427659. The next prime is 661427719. The reversal of 661427662 is 266724166.

It is a congruent number.

It is an unprimeable number.

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, 575583 + ... + 576730.

It is an arithmetic number, because the mean of its divisors is an integer number (72595782).

Almost surely, 2^661427662 is an apocalyptic number.

661427662 is a deficient number, since it is larger than the sum of its proper divisors (500104850).

661427662 is a wasteful number, since it uses less digits than its factorization.

661427662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152363.

The product of its digits is 145152, while the sum is 40.

The square root of 661427662 is about 25718.2359814976. The cubic root of 661427662 is about 871.2860980345.

The spelling of 661427662 in words is "six hundred sixty-one million, four hundred twenty-seven thousand, six hundred sixty-two".