145156661 has 16 divisors (see below), whose sum is σ = 161234304. Its totient is φ = 129812544.

The previous prime is 145156619. The next prime is 145156673. The reversal of 145156661 is 166651541.

145156661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 145156661 - 2¹⁸ = 144894517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145156961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147176 + ... + 148158.

It is an arithmetic number, because the mean of its divisors is an integer number (10077144).

Almost surely, 2^145156661 is an apocalyptic number.

It is an amenable number.

145156661 is a deficient number, since it is larger than the sum of its proper divisors (16077643).

145156661 is a wasteful number, since it uses less digits than its factorization.

145156661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its digits is 21600, while the sum is 35.

The square root of 145156661 is about 12048.0978166680. The cubic root of 145156661 is about 525.5479219850.

The spelling of 145156661 in words is "one hundred forty-five million, one hundred fifty-six thousand, six hundred sixty-one".