661164614 has 8 divisors (see below), whose sum is σ = 1081905768. Its totient is φ = 300529360.

The previous prime is 661164613. The next prime is 661164617. The reversal of 661164614 is 416461166.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661164613) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15026447 + ... + 15026490.

It is an arithmetic number, because the mean of its divisors is an integer number (135238221).

Almost surely, 2^661164614 is an apocalyptic number.

661164614 is a deficient number, since it is larger than the sum of its proper divisors (420741154).

661164614 is a wasteful number, since it uses less digits than its factorization.

661164614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30052950.

The product of its digits is 20736, while the sum is 35.

The square root of 661164614 is about 25713.1214363406. The cubic root of 661164614 is about 871.1705800078.

The spelling of 661164614 in words is "six hundred sixty-one million, one hundred sixty-four thousand, six hundred fourteen".