66177340 has 12 divisors (see below), whose sum is σ = 138972456. Its totient is φ = 26470928.

The previous prime is 66177317. The next prime is 66177451. The reversal of 66177340 is 4377166.

It is a junction number, because it is equal to n+sod(n) for n = 66177296 and 66177305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654414 + ... + 1654453.

It is an arithmetic number, because the mean of its divisors is an integer number (11581038).

Almost surely, 2^66177340 is an apocalyptic number.

It is an amenable number.

66177340 is an abundant number, since it is smaller than the sum of its proper divisors (72795116).

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

66177340 is a wasteful number, since it uses less digits than its factorization.

66177340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308876 (or 3308874 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 66177340 is about 8134.9456052269. The cubic root of 66177340 is about 404.4856346725.

The spelling of 66177340 in words is "sixty-six million, one hundred seventy-seven thousand, three hundred forty".