66420594 has 32 divisors (see below), whose sum is σ = 148680000. Its totient is φ = 21978432.

The previous prime is 66420559. The next prime is 66420671. The reversal of 66420594 is 49502466.

66420594 is a `hidden beast` number, since 6 + 64 + 2 + 0 + 594 = 666.

It is a super-3 number, since 3×66420594³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3082 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (4646250).

Almost surely, 2^66420594 is an apocalyptic number.

66420594 is an abundant number, since it is smaller than the sum of its proper divisors (82259406).

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

66420594 is a wasteful number, since it uses less digits than its factorization.

66420594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8999 (or 8993 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 66420594 is about 8149.8830666458. The cubic root of 66420594 is about 404.9806300750.

The spelling of 66420594 in words is "sixty-six million, four hundred twenty thousand, five hundred ninety-four".