156961566 has 12 divisors (see below), whose sum is σ = 340083432. Its totient is φ = 52320516.

The previous prime is 156961559. The next prime is 156961579. The reversal of 156961566 is 665169651.

156961566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4360026 + ... + 4360061.

It is an arithmetic number, because the mean of its divisors is an integer number (28340286).

Almost surely, 2^156961566 is an apocalyptic number.

156961566 is an abundant number, since it is smaller than the sum of its proper divisors (183121866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156961566 is a wasteful number, since it uses less digits than its factorization.

156961566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8720095 (or 8720092 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 156961566 is about 12528.4303087019. The cubic root of 156961566 is about 539.4250464839.

The spelling of 156961566 in words is "one hundred fifty-six million, nine hundred sixty-one thousand, five hundred sixty-six".