621144366 has 8 divisors (see below), whose sum is σ = 1242288744. Its totient is φ = 207048120.

The previous prime is 621144347. The next prime is 621144367. The reversal of 621144366 is 663441126.

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

621144366 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621144367) 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, 51762025 + ... + 51762036.

It is an arithmetic number, because the mean of its divisors is an integer number (155286093).

Almost surely, 2^621144366 is an apocalyptic number.

621144366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

621144366 is a wasteful number, since it uses less digits than its factorization.

621144366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103524066.

The product of its digits is 20736, while the sum is 33.

The square root of 621144366 is about 24922.7680244390. The cubic root of 621144366 is about 853.2262011841.

The spelling of 621144366 in words is "six hundred twenty-one million, one hundred forty-four thousand, three hundred sixty-six".