66470814 has 16 divisors (see below), whose sum is σ = 147713040. Its totient is φ = 22156920.

The previous prime is 66470809. The next prime is 66470857. The reversal of 66470814 is 41807466.

66470814 is a `hidden beast` number, since 6 + 647 + 0 + 8 + 1 + 4 = 666.

It is a super-2 number, since 2×66470814² = 8836738227645192, which contains 22 as substring.

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, 615417 + ... + 615524.

It is an arithmetic number, because the mean of its divisors is an integer number (9232065).

Almost surely, 2^66470814 is an apocalyptic number.

66470814 is an abundant number, since it is smaller than the sum of its proper divisors (81242226).

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

66470814 is a wasteful number, since it uses less digits than its factorization.

66470814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230952 (or 1230946 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 66470814 is about 8152.9635102826. The cubic root of 66470814 is about 405.0826717378.

The spelling of 66470814 in words is "sixty-six million, four hundred seventy thousand, eight hundred fourteen".