66441516 has 24 divisors (see below), whose sum is σ = 157215744. Its totient is φ = 21834960.

The previous prime is 66441511. The next prime is 66441517. The reversal of 66441516 is 61514466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66441511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38140 + ... + 39843.

It is an arithmetic number, because the mean of its divisors is an integer number (6550656).

Almost surely, 2^66441516 is an apocalyptic number.

It is an amenable number.

66441516 is an abundant number, since it is smaller than the sum of its proper divisors (90774228).

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

66441516 is a wasteful number, since it uses less digits than its factorization.

66441516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78061 (or 78059 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 66441516 is about 8151.1665422809. The cubic root of 66441516 is about 405.0231475872.

The spelling of 66441516 in words is "sixty-six million, four hundred forty-one thousand, five hundred sixteen".