66665346 has 16 divisors (see below), whose sum is σ = 145451808. Its totient is φ = 20201600.

The previous prime is 66665341. The next prime is 66665359. The reversal of 66665346 is 64356666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66665298 and 66665307.

It is not an unprimeable number, because it can be changed into a prime (66665341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504975 + ... + 505106.

It is an arithmetic number, because the mean of its divisors is an integer number (9090738).

Almost surely, 2^66665346 is an apocalyptic number.

66665346 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66665346 is an abundant number, since it is smaller than the sum of its proper divisors (78786462).

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

66665346 is a wasteful number, since it uses less digits than its factorization.

66665346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010097.

The product of its digits is 466560, while the sum is 42.

The square root of 66665346 is about 8164.8849348904. The cubic root of 66665346 is about 405.4774555001.

The spelling of 66665346 in words is "sixty-six million, six hundred sixty-five thousand, three hundred forty-six".