146661805 has 16 divisors (see below), whose sum is σ = 187049520. Its totient is φ = 110011392.

The previous prime is 146661799. The next prime is 146661829. The reversal of 146661805 is 508166641.

It can be written as a sum of positive squares in 8 ways, for example, as 1435204 + 145226601 = 1198^2 + 12051^2 .

It is a cyclic number.

It is not a de Polignac number, because 146661805 - 2⁵ = 146661773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20431 + ... + 26659.

It is an arithmetic number, because the mean of its divisors is an integer number (11690595).

Almost surely, 2^146661805 is an apocalyptic number.

It is an amenable number.

146661805 is a deficient number, since it is larger than the sum of its proper divisors (40387715).

146661805 is a wasteful number, since it uses less digits than its factorization.

146661805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6528.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 146661805 is about 12110.4006952702. The cubic root of 146661805 is about 527.3581658607.

It can be divided in two parts, 14666 and 1805, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 146661805 in words is "one hundred forty-six million, six hundred sixty-one thousand, eight hundred five".