65951628 has 12 divisors (see below), whose sum is σ = 153887160. Its totient is φ = 21983872.

The previous prime is 65951623. The next prime is 65951629. The reversal of 65951628 is 82615956.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 65951628.

It is not an unprimeable number, because it can be changed into a prime (65951623) 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, 2747973 + ... + 2747996.

It is an arithmetic number, because the mean of its divisors is an integer number (12823930).

Almost surely, 2^65951628 is an apocalyptic number.

It is an amenable number.

65951628 is an abundant number, since it is smaller than the sum of its proper divisors (87935532).

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

65951628 is a wasteful number, since it uses less digits than its factorization.

65951628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495976 (or 5495974 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 65951628 is about 8121.0607681509. The cubic root of 65951628 is about 404.0252492143.

The spelling of 65951628 in words is "sixty-five million, nine hundred fifty-one thousand, six hundred twenty-eight".