621220067677 has 4 divisors (see below), whose sum is σ = 677694619296. Its totient is φ = 564745516060.

The previous prime is 621220067659. The next prime is 621220067687. The reversal of 621220067677 is 776760022126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 621220067677 - 2⁷ = 621220067549 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 (621220067687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28237275793 + ... + 28237275814.

It is an arithmetic number, because the mean of its divisors is an integer number (169423654824).

Almost surely, 2^621220067677 is an apocalyptic number.

It is an amenable number.

621220067677 is a deficient number, since it is larger than the sum of its proper divisors (56474551619).

621220067677 is a wasteful number, since it uses less digits than its factorization.

621220067677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56474551618.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 621220067677 in words is "six hundred twenty-one billion, two hundred twenty million, sixty-seven thousand, six hundred seventy-seven".