165401970 has 32 divisors (see below), whose sum is σ = 414225792. Its totient is φ = 42189312.

The previous prime is 165401969. The next prime is 165401981. The reversal of 165401970 is 79104561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119167 + ... + 120546.

It is an arithmetic number, because the mean of its divisors is an integer number (12944556).

Almost surely, 2^165401970 is an apocalyptic number.

165401970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165401970 is an abundant number, since it is smaller than the sum of its proper divisors (248823822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165401970 is a wasteful number, since it uses less digits than its factorization.

165401970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239746.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 165401970 is about 12860.8697217568. The cubic root of 165401970 is about 548.9256935739.

The spelling of 165401970 in words is "one hundred sixty-five million, four hundred one thousand, nine hundred seventy".