66150440 has 32 divisors (see below), whose sum is σ = 151066080. Its totient is φ = 26064192.

The previous prime is 66150437. The next prime is 66150449. The reversal of 66150440 is 4405166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66150449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9662 + ... + 15021.

It is an arithmetic number, because the mean of its divisors is an integer number (4720815).

Almost surely, 2^66150440 is an apocalyptic number.

It is an amenable number.

66150440 is an abundant number, since it is smaller than the sum of its proper divisors (84915640).

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

66150440 is a wasteful number, since it uses less digits than its factorization.

66150440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24761 (or 24757 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66150440 is about 8133.2920763981. The cubic root of 66150440 is about 404.4308216596.

The spelling of 66150440 in words is "sixty-six million, one hundred fifty thousand, four hundred forty".