66622380 has 48 divisors (see below), whose sum is σ = 203503104. Its totient is φ = 16150720.

The previous prime is 66622333. The next prime is 66622393. The reversal of 66622380 is 8322666.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 49812 + ... + 51131.

It is an arithmetic number, because the mean of its divisors is an integer number (4239648).

Almost surely, 2^66622380 is an apocalyptic number.

66622380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66622380 is an abundant number, since it is smaller than the sum of its proper divisors (136880724).

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

66622380 is a wasteful number, since it uses less digits than its factorization.

66622380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100966 (or 100964 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66622380 is about 8162.2533653397. The cubic root of 66622380 is about 405.3903263316.

The spelling of 66622380 in words is "sixty-six million, six hundred twenty-two thousand, three hundred eighty".