1610166399 has 4 divisors (see below), whose sum is σ = 2146888536. Its totient is φ = 1073444264.

The previous prime is 1610166379. The next prime is 1610166401. The reversal of 1610166399 is 9936610161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9936610161 = 3 ⋅3312203387.

It is a cyclic number.

It is not a de Polignac number, because 1610166399 - 2¹² = 1610162303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1610166399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610166379) 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, 268361064 + ... + 268361069.

It is an arithmetic number, because the mean of its divisors is an integer number (536722134).

Almost surely, 2^1610166399 is an apocalyptic number.

1610166399 is a deficient number, since it is larger than the sum of its proper divisors (536722137).

1610166399 is an equidigital number, since it uses as much as digits as its factorization.

1610166399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536722136.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 1610166399 is about 40126.8787597540. The cubic root of 1610166399 is about 1172.0790945448.

The spelling of 1610166399 in words is "one billion, six hundred ten million, one hundred sixty-six thousand, three hundred ninety-nine".