66550750 has 64 divisors (see below), whose sum is σ = 150823296. Its totient is φ = 21465600.

The previous prime is 66550741. The next prime is 66550763. The reversal of 66550750 is 5705566.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28632 + ... + 30868.

It is an arithmetic number, because the mean of its divisors is an integer number (2356614).

Almost surely, 2^66550750 is an apocalyptic number.

66550750 is an abundant number, since it is smaller than the sum of its proper divisors (84272546).

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

66550750 is a wasteful number, since it uses less digits than its factorization.

66550750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 66550750 is about 8157.8643038482. The cubic root of 66550750 is about 405.2449871718.

It can be divided in two parts, 665 and 50750, that added together give a palindrome (51415).

The spelling of 66550750 in words is "sixty-six million, five hundred fifty thousand, seven hundred fifty".