665414190 has 96 divisors (see below), whose sum is σ = 2050513920. Its totient is φ = 152090784.

The previous prime is 665414171. The next prime is 665414209. The reversal of 665414190 is 91414566.

It is an interprime number because it is at equal distance from previous prime (665414171) and next prime (665414209).

It is a super-2 number, since 2×665414190² = 885552088506712200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2550 + ... + 36569.

It is an arithmetic number, because the mean of its divisors is an integer number (21359520).

Almost surely, 2^665414190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665414190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025256960).

665414190 is an abundant number, since it is smaller than the sum of its proper divisors (1385099730).

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

665414190 is a wasteful number, since it uses less digits than its factorization.

665414190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39148 (or 39136 counting only the distinct ones).

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

The square root of 665414190 is about 25795.6234660068. The cubic root of 665414190 is about 873.0330522081.

The spelling of 665414190 in words is "six hundred sixty-five million, four hundred fourteen thousand, one hundred ninety".