156661416 has 24 divisors (see below), whose sum is σ = 424291530. Its totient is φ = 52220448.

The previous prime is 156661411. The next prime is 156661423. The reversal of 156661416 is 614166651.

It is a happy number.

156661416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 152621316 + 4040100 = 12354^2 + 2010^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (156661411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1087855 + ... + 1087998.

Almost surely, 2^156661416 is an apocalyptic number.

It is an amenable number.

156661416 is an abundant number, since it is smaller than the sum of its proper divisors (267630114).

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

156661416 is a wasteful number, since it uses less digits than its factorization.

156661416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175865 (or 2175858 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 156661416 is about 12516.4458213983. The cubic root of 156661416 is about 539.0809882859.

The spelling of 156661416 in words is "one hundred fifty-six million, six hundred sixty-one thousand, four hundred sixteen".