661282156 has 12 divisors (see below), whose sum is σ = 1218151480. Its totient is φ = 313238880.

The previous prime is 661282147. The next prime is 661282187. The reversal of 661282156 is 651282166.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 4350465 + ... + 4350616.

Almost surely, 2^661282156 is an apocalyptic number.

It is an amenable number.

661282156 is a deficient number, since it is larger than the sum of its proper divisors (556869324).

661282156 is a wasteful number, since it uses less digits than its factorization.

661282156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8701104 (or 8701102 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 661282156 is about 25715.4069771412. The cubic root of 661282156 is about 871.2222025854. Note that the first 4 decimals are identical.

The spelling of 661282156 in words is "six hundred sixty-one million, two hundred eighty-two thousand, one hundred fifty-six".