320666970 has 32 divisors (see below), whose sum is σ = 828801792. Its totient is φ = 78933312.

The previous prime is 320666963. The next prime is 320666977. The reversal of 320666970 is 79666023.

It is an interprime number because it is at equal distance from previous prime (320666963) and next prime (320666977).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (320666977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410722 + ... + 411501.

It is an arithmetic number, because the mean of its divisors is an integer number (25900056).

Almost surely, 2^320666970 is an apocalyptic number.

320666970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320666970 is an abundant number, since it is smaller than the sum of its proper divisors (508134822).

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

320666970 is a wasteful number, since it uses less digits than its factorization.

320666970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822246.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 320666970 is about 17907.1764943556. The cubic root of 320666970 is about 684.4652583362.

The spelling of 320666970 in words is "three hundred twenty million, six hundred sixty-six thousand, nine hundred seventy".