165917930 has 8 divisors (see below), whose sum is σ = 298652292. Its totient is φ = 66367168.

The previous prime is 165917923. The next prime is 165917957. The reversal of 165917930 is 39719561.

It can be written as a sum of positive squares in 2 ways, for example, as 151757761 + 14160169 = 12319^2 + 3763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8295887 + ... + 8295906.

Almost surely, 2^165917930 is an apocalyptic number.

165917930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165917930 is a deficient number, since it is larger than the sum of its proper divisors (132734362).

165917930 is a wasteful number, since it uses less digits than its factorization.

165917930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16591800.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 165917930 is about 12880.9133992897. The cubic root of 165917930 is about 549.4958796711.

The spelling of 165917930 in words is "one hundred sixty-five million, nine hundred seventeen thousand, nine hundred thirty".