346665690 has 96 divisors (see below), whose sum is σ = 1075412160. Its totient is φ = 79234848.

The previous prime is 346665689. The next prime is 346665707. The reversal of 346665690 is 96566643.

It is a super-2 number, since 2×346665690² = 240354201246352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 129 + ... + 26331.

It is an arithmetic number, because the mean of its divisors is an integer number (11202210).

Almost surely, 2^346665690 is an apocalyptic number.

346665690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 346665690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537706080).

346665690 is an abundant number, since it is smaller than the sum of its proper divisors (728746470).

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

346665690 is a wasteful number, since it uses less digits than its factorization.

346665690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26233 (or 26220 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The square root of 346665690 is about 18618.9604972995. The cubic root of 346665690 is about 702.4848356465.

The spelling of 346665690 in words is "three hundred forty-six million, six hundred sixty-five thousand, six hundred ninety".