661150156 has 12 divisors (see below), whose sum is σ = 1159777080. Its totient is φ = 329785280.

The previous prime is 661150153. The next prime is 661150169. The reversal of 661150156 is 651051166.

661150156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (661150153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195565 + ... + 198916.

It is an arithmetic number, because the mean of its divisors is an integer number (96648090).

Almost surely, 2^661150156 is an apocalyptic number.

It is an amenable number.

661150156 is a deficient number, since it is larger than the sum of its proper divisors (498626924).

661150156 is a wasteful number, since it uses less digits than its factorization.

661150156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394904 (or 394902 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 661150156 is about 25712.8402942965. The cubic root of 661150156 is about 871.1642298615.

The spelling of 661150156 in words is "six hundred sixty-one million, one hundred fifty thousand, one hundred fifty-six".