66070620 has 288 divisors, whose sum is σ = 261999360. Its totient is φ = 13668480.

The previous prime is 66070601. The next prime is 66070649. The reversal of 66070620 is 2607066.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 290947 + ... + 291173.

It is an arithmetic number, because the mean of its divisors is an integer number (909720).

Almost surely, 2^66070620 is an apocalyptic number.

66070620 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 66070620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130999680).

66070620 is an abundant number, since it is smaller than the sum of its proper divisors (195928740).

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

66070620 is a wasteful number, since it uses less digits than its factorization.

66070620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 66070620 is about 8128.3836031526. The cubic root of 66070620 is about 404.2680882444.

Adding to 66070620 its reverse (2607066), we get a palindrome (68677686).

The spelling of 66070620 in words is "sixty-six million, seventy thousand, six hundred twenty".