66097420 has 12 divisors (see below), whose sum is σ = 138804624. Its totient is φ = 26438960.

The previous prime is 66097391. The next prime is 66097433. The reversal of 66097420 is 2479066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652416 + ... + 1652455.

It is an arithmetic number, because the mean of its divisors is an integer number (11567052).

Almost surely, 2^66097420 is an apocalyptic number.

It is an amenable number.

66097420 is an abundant number, since it is smaller than the sum of its proper divisors (72707204).

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

66097420 is a wasteful number, since it uses less digits than its factorization.

66097420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304880 (or 3304878 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 66097420 is about 8130.0319802569. The cubic root of 66097420 is about 404.3227414836.

The spelling of 66097420 in words is "sixty-six million, ninety-seven thousand, four hundred twenty".