65670220 has 48 divisors (see below), whose sum is σ = 171940608. Its totient is φ = 20468160.

The previous prime is 65670197. The next prime is 65670247. The reversal of 65670220 is 2207656.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 19782 + ... + 22861.

It is an arithmetic number, because the mean of its divisors is an integer number (3582096).

Almost surely, 2^65670220 is an apocalyptic number.

It is an amenable number.

65670220 is an abundant number, since it is smaller than the sum of its proper divisors (106270388).

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

65670220 is a wasteful number, since it uses less digits than its factorization.

65670220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42670 (or 42668 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 65670220 is about 8103.7164313665. The cubic root of 65670220 is about 403.4497868926.

Adding to 65670220 its reverse (2207656), we get a palindrome (67877876).

It can be divided in two parts, 656 and 70220, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 65670220 in words is "sixty-five million, six hundred seventy thousand, two hundred twenty".