621662 has 4 divisors (see below), whose sum is σ = 932496. Its totient is φ = 310830.

The previous prime is 621641. The next prime is 621671. The reversal of 621662 is 266126.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

621662 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155414 + ... + 155417.

It is an arithmetic number, because the mean of its divisors is an integer number (233124).

2⁶²¹⁶⁶² is an apocalyptic number.

621662 is a deficient number, since it is larger than the sum of its proper divisors (310834).

621662 is a wasteful number, since it uses less digits than its factorization.

621662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310833.

The product of its digits is 864, while the sum is 23.

The square root of 621662 is about 788.4554521341. The cubic root of 621662 is about 85.3463148925.

Adding to 621662 its reverse (266126), we get a palindrome (887788).

The spelling of 621662 in words is "six hundred twenty-one thousand, six hundred sixty-two".