66740550 has 24 divisors (see below), whose sum is σ = 165516936. Its totient is φ = 17797440.

The previous prime is 66740539. The next prime is 66740567. The reversal of 66740550 is 5504766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222319 + ... + 222618.

It is an arithmetic number, because the mean of its divisors is an integer number (6896539).

Almost surely, 2^66740550 is an apocalyptic number.

66740550 is an abundant number, since it is smaller than the sum of its proper divisors (98776386).

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

66740550 is a wasteful number, since it uses less digits than its factorization.

66740550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444952 (or 444947 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 66740550 is about 8169.4889681057. The cubic root of 66740550 is about 405.6298688561.

The spelling of 66740550 in words is "sixty-six million, seven hundred forty thousand, five hundred fifty".