6465690 has 128 divisors (see below), whose sum is σ = 21565440. Its totient is φ = 1339200.

The previous prime is 6465677. The next prime is 6465703. The reversal of 6465690 is 965646.

It is a happy number.

6465690 is a `hidden beast` number, since 646 + 5 + 6 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (6465677) and next prime (6465703).

It is a super-2 number, since 2×6465690² = 83610294352200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20635 + ... + 20945.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

Almost surely, 2^6465690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6465690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10782720).

6465690 is an abundant number, since it is smaller than the sum of its proper divisors (15099750).

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

6465690 is a wasteful number, since it uses less digits than its factorization.

6465690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6465690 is about 2542.7721093326. The cubic root of 6465690 is about 186.2966131097.

It can be divided in two parts, 64656 and 90, that added together give a palindrome (64746).

The spelling of 6465690 in words is "six million, four hundred sixty-five thousand, six hundred ninety".