64996020 has 120 divisors (see below), whose sum is σ = 208016424. Its totient is φ = 16982784.

The previous prime is 64996007. The next prime is 64996021. The reversal of 64996020 is 2069946.

64996020 is a `hidden beast` number, since 6 + 49 + 9 + 602 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14699556 + 50296464 = 3834^2 + 7092^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64996021) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85482 + ... + 86238.

Almost surely, 2^64996020 is an apocalyptic number.

64996020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64996020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104008212).

64996020 is an abundant number, since it is smaller than the sum of its proper divisors (143020404).

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

64996020 is a wasteful number, since it uses less digits than its factorization.

64996020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 64996020 is about 8062.0109153982. The cubic root of 64996020 is about 402.0643692870.

It can be divided in two parts, 649 and 96020, that added together give a palindrome (96669).

The spelling of 64996020 in words is "sixty-four million, nine hundred ninety-six thousand, twenty".