670701021 has 16 divisors (see below), whose sum is σ = 908700864. Its totient is φ = 439933824.

The previous prime is 670701019. The next prime is 670701023. The reversal of 670701021 is 120107076.

It is an interprime number because it is at equal distance from previous prime (670701019) and next prime (670701023).

It is not a de Polignac number, because 670701021 - 2¹ = 670701019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 670700982 and 670701000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670701023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238395 + ... + 241191.

It is an arithmetic number, because the mean of its divisors is an integer number (56793804).

Almost surely, 2^670701021 is an apocalyptic number.

It is an amenable number.

670701021 is a deficient number, since it is larger than the sum of its proper divisors (237999843).

670701021 is a wasteful number, since it uses less digits than its factorization.

670701021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 670701021 is about 25897.8960728473. The cubic root of 670701021 is about 875.3390886033.

Adding to 670701021 its reverse (120107076), we get a palindrome (790808097).

The spelling of 670701021 in words is "six hundred seventy million, seven hundred one thousand, twenty-one".