66723708 has 48 divisors (see below), whose sum is σ = 165473280. Its totient is φ = 20853504.

The previous prime is 66723697. The next prime is 66723721. The reversal of 66723708 is 80732766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76885 + ... + 77747.

It is an arithmetic number, because the mean of its divisors is an integer number (3447360).

Almost surely, 2^66723708 is an apocalyptic number.

66723708 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66723708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82736640).

66723708 is an abundant number, since it is smaller than the sum of its proper divisors (98749572).

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

66723708 is a wasteful number, since it uses less digits than its factorization.

66723708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 66723708 is about 8168.4581164379. The cubic root of 66723708 is about 405.5957457081.

The spelling of 66723708 in words is "sixty-six million, seven hundred twenty-three thousand, seven hundred eight".