82640066 has 8 divisors (see below), whose sum is σ = 126843024. Its totient is φ = 40359060.

The previous prime is 82640021. The next prime is 82640071. The reversal of 82640066 is 66004628.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480380 + ... + 480551.

It is an arithmetic number, because the mean of its divisors is an integer number (15855378).

Almost surely, 2^82640066 is an apocalyptic number.

82640066 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

82640066 is a deficient number, since it is larger than the sum of its proper divisors (44202958).

82640066 is a wasteful number, since it uses less digits than its factorization.

82640066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960976.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 82640066 is about 9090.6581719917. The cubic root of 82640066 is about 435.5756082799.

The spelling of 82640066 in words is "eighty-two million, six hundred forty thousand, sixty-six".