66420574 has 16 divisors (see below), whose sum is σ = 111340656. Its totient is φ = 29454400.

The previous prime is 66420559. The next prime is 66420671. The reversal of 66420574 is 47502466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35917 + ... + 37720.

It is an arithmetic number, because the mean of its divisors is an integer number (6958791).

Almost surely, 2^66420574 is an apocalyptic number.

66420574 is a deficient number, since it is larger than the sum of its proper divisors (44920082).

66420574 is a wasteful number, since it uses less digits than its factorization.

66420574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73691.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 66420574 is about 8149.8818396342. The cubic root of 66420574 is about 404.9805894269.

The spelling of 66420574 in words is "sixty-six million, four hundred twenty thousand, five hundred seventy-four".