66470940 has 36 divisors (see below), whose sum is σ = 201629064. Its totient is φ = 17725536.

The previous prime is 66470927. The next prime is 66470941. The reversal of 66470940 is 4907466.

66470940 is a `hidden beast` number, since 6 + 647 + 0 + 9 + 4 + 0 = 666.

66470940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 66470895 and 66470904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66470941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184462 + ... + 184821.

Almost surely, 2^66470940 is an apocalyptic number.

66470940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66470940 is an abundant number, since it is smaller than the sum of its proper divisors (135158124).

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

66470940 is a wasteful number, since it uses less digits than its factorization.

66470940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369298 (or 369293 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66470940 is about 8152.9712375305. The cubic root of 66470940 is about 405.0829276917.

The spelling of 66470940 in words is "sixty-six million, four hundred seventy thousand, nine hundred forty".