66376644 has 24 divisors (see below), whose sum is σ = 155127840. Its totient is φ = 22089984.

The previous prime is 66376627. The next prime is 66376657. The reversal of 66376644 is 44667366.

It is a junction number, because it is equal to n+sod(n) for n = 66376596 and 66376605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3967 + ... + 12185.

It is an arithmetic number, because the mean of its divisors is an integer number (6463660).

Almost surely, 2^66376644 is an apocalyptic number.

It is an amenable number.

66376644 is an abundant number, since it is smaller than the sum of its proper divisors (88751196).

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

66376644 is a wasteful number, since it uses less digits than its factorization.

66376644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8899 (or 8897 counting only the distinct ones).

The product of its digits is 435456, while the sum is 42.

The square root of 66376644 is about 8147.1862627535. The cubic root of 66376644 is about 404.8912861689.

The spelling of 66376644 in words is "sixty-six million, three hundred seventy-six thousand, six hundred forty-four".