163850661 has 64 divisors (see below), whose sum is σ = 279552000. Its totient is φ = 94011840.

The previous prime is 163850657. The next prime is 163850669. The reversal of 163850661 is 166058361.

It is a happy number.

It is not a de Polignac number, because 163850661 - 2² = 163850657 is a prime.

It is a super-2 number, since 2×163850661² = 53694078220273842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163850669) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 526696 + ... + 527006.

It is an arithmetic number, because the mean of its divisors is an integer number (4368000).

Almost surely, 2^163850661 is an apocalyptic number.

It is an amenable number.

163850661 is a deficient number, since it is larger than the sum of its proper divisors (115701339).

163850661 is a wasteful number, since it uses less digits than its factorization.

163850661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 163850661 is about 12800.4164385382. The cubic root of 163850661 is about 547.2041712036.

The spelling of 163850661 in words is "one hundred sixty-three million, eight hundred fifty thousand, six hundred sixty-one".