65621116 has 48 divisors (see below), whose sum is σ = 132991488. Its totient is φ = 28036800.

The previous prime is 65621107. The next prime is 65621123. The reversal of 65621116 is 61112656.

It is a super-2 number, since 2×65621116² = 8612261730170912, which contains 22 as substring.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61201 + ... + 62263.

It is an arithmetic number, because the mean of its divisors is an integer number (2770656).

Almost surely, 2^65621116 is an apocalyptic number.

It is an amenable number.

65621116 is an abundant number, since it is smaller than the sum of its proper divisors (67370372).

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

65621116 is a wasteful number, since it uses less digits than its factorization.

65621116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1160 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 65621116 is about 8100.6861437782. The cubic root of 65621116 is about 403.3492038166.

The spelling of 65621116 in words is "sixty-five million, six hundred twenty-one thousand, one hundred sixteen".