612665020 has 96 divisors (see below), whose sum is σ = 1466942400. Its totient is φ = 212889600.

The previous prime is 612664973. The next prime is 612665021. The reversal of 612665020 is 20566216.

It is a self number, because there is not a number n which added to its sum of digits gives 612665020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612665021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 694980 + ... + 695860.

It is an arithmetic number, because the mean of its divisors is an integer number (15280650).

Almost surely, 2^612665020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612665020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733471200).

612665020 is an abundant number, since it is smaller than the sum of its proper divisors (854277380).

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

612665020 is a wasteful number, since it uses less digits than its factorization.

612665020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 612665020 is about 24752.0710244618. The cubic root of 612665020 is about 849.3258876661.

The spelling of 612665020 in words is "six hundred twelve million, six hundred sixty-five thousand, twenty".