670017101621 has 16 divisors (see below), whose sum is σ = 790575464448. Its totient is φ = 555675735600.

The previous prime is 670017101569. The next prime is 670017101627. The reversal of 670017101621 is 126101710076.

It is a cyclic number.

It is not a de Polignac number, because 670017101621 - 2³⁸ = 395139194677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670017101627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961556 + ... + 1504866.

It is an arithmetic number, because the mean of its divisors is an integer number (49410966528).

Almost surely, 2^670017101621 is an apocalyptic number.

It is an amenable number.

670017101621 is a deficient number, since it is larger than the sum of its proper divisors (120558362827).

670017101621 is a wasteful number, since it uses less digits than its factorization.

670017101621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549032.

The product of its (nonzero) digits is 3528, while the sum is 32.

Adding to 670017101621 its reverse (126101710076), we get a palindrome (796118811697).

The spelling of 670017101621 in words is "six hundred seventy billion, seventeen million, one hundred one thousand, six hundred twenty-one".