145667657 has 4 divisors (see below), whose sum is σ = 145700736. Its totient is φ = 145634580.

The previous prime is 145667651. The next prime is 145667681. The reversal of 145667657 is 756766541.

145667657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756766541 = 67 ⋅11295023.

It is a cyclic number.

It is not a de Polignac number, because 145667657 - 2²⁰ = 144619081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145667651) 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, 8693 + ... + 19154.

It is an arithmetic number, because the mean of its divisors is an integer number (36425184).

Almost surely, 2^145667657 is an apocalyptic number.

It is an amenable number.

145667657 is a deficient number, since it is larger than the sum of its proper divisors (33079).

145667657 is an equidigital number, since it uses as much as digits as its factorization.

145667657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33078.

The product of its digits is 1058400, while the sum is 47.

The square root of 145667657 is about 12069.2856872310. The cubic root of 145667657 is about 526.1638964075.

The spelling of 145667657 in words is "one hundred forty-five million, six hundred sixty-seven thousand, six hundred fifty-seven".