66605250 has 32 divisors (see below), whose sum is σ = 166248576. Its totient is φ = 17761200.

The previous prime is 66605249. The next prime is 66605281. The reversal of 66605250 is 5250666.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 43654 + ... + 45153.

It is an arithmetic number, because the mean of its divisors is an integer number (5195268).

Almost surely, 2^66605250 is an apocalyptic number.

66605250 is an abundant number, since it is smaller than the sum of its proper divisors (99643326).

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

66605250 is a wasteful number, since it uses less digits than its factorization.

66605250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88827 (or 88817 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 66605250 is about 8161.2039552997. The cubic root of 66605250 is about 405.3555785909.

The spelling of 66605250 in words is "sixty-six million, six hundred five thousand, two hundred fifty".