66598620 has 48 divisors (see below), whose sum is σ = 203430528. Its totient is φ = 16144960.

The previous prime is 66598601. The next prime is 66598643. The reversal of 66598620 is 2689566.

It is a congruent number.

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, 49794 + ... + 51113.

It is an arithmetic number, because the mean of its divisors is an integer number (4238136).

Almost surely, 2^66598620 is an apocalyptic number.

66598620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66598620 is an abundant number, since it is smaller than the sum of its proper divisors (136831908).

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

66598620 is a wasteful number, since it uses less digits than its factorization.

66598620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100930 (or 100928 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 66598620 is about 8160.7977551217. The cubic root of 66598620 is about 405.3421282165.

The spelling of 66598620 in words is "sixty-six million, five hundred ninety-eight thousand, six hundred twenty".