146178661 has 2 divisors, whose sum is σ = 146178662. Its totient is φ = 146178660.

The previous prime is 146178649. The next prime is 146178667. The reversal of 146178661 is 166871641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141848100 + 4330561 = 11910^2 + 2081^2 .

It is a cyclic number.

It is not a de Polignac number, because 146178661 - 2²⁷ = 11960933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146178667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73089330 + 73089331.

It is an arithmetic number, because the mean of its divisors is an integer number (73089331).

Almost surely, 2^146178661 is an apocalyptic number.

It is an amenable number.

146178661 is a deficient number, since it is larger than the sum of its proper divisors (1).

146178661 is an equidigital number, since it uses as much as digits as its factorization.

146178661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 146178661 is about 12090.4367580332. The cubic root of 146178661 is about 526.7784415774.

The spelling of 146178661 in words is "one hundred forty-six million, one hundred seventy-eight thousand, six hundred sixty-one".