661061662 has 8 divisors (see below), whose sum is σ = 991993392. Its totient is φ = 330397200.

The previous prime is 661061593. The next prime is 661061663. The reversal of 661061662 is 266160166.

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 (661061663) 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, 60514 + ... + 70597.

It is an arithmetic number, because the mean of its divisors is an integer number (123999174).

Almost surely, 2^661061662 is an apocalyptic number.

661061662 is a deficient number, since it is larger than the sum of its proper divisors (330931730).

661061662 is a wasteful number, since it uses less digits than its factorization.

661061662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133634.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 661061662 is about 25711.1194233157. The cubic root of 661061662 is about 871.1253600998.

The spelling of 661061662 in words is "six hundred sixty-one million, sixty-one thousand, six hundred sixty-two".