207664426621 has 8 divisors (see below), whose sum is σ = 208097469440. Its totient is φ = 207231692112.

The previous prime is 207664426579. The next prime is 207664426631. The reversal of 207664426621 is 126624466702.

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

It is a cyclic number.

It is not a de Polignac number, because 207664426621 - 2¹¹ = 207664424573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207664426631) 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, 1296856 + ... + 1448158.

It is an arithmetic number, because the mean of its divisors is an integer number (26012183680).

Almost surely, 2^207664426621 is an apocalyptic number.

It is an amenable number.

207664426621 is a deficient number, since it is larger than the sum of its proper divisors (433042819).

207664426621 is a wasteful number, since it uses less digits than its factorization.

207664426621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154155.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 207664426621 in words is "two hundred seven billion, six hundred sixty-four million, four hundred twenty-six thousand, six hundred twenty-one".