66610470 has 16 divisors (see below), whose sum is σ = 159865200. Its totient is φ = 17762784.

The previous prime is 66610457. The next prime is 66610493. The reversal of 66610470 is 7401666.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2220349 = 66610470 / (6 + 6 + 6 + 1 + 0 + 4 + 7 + 0).

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, 1110145 + ... + 1110204.

It is an arithmetic number, because the mean of its divisors is an integer number (9991575).

Almost surely, 2^66610470 is an apocalyptic number.

66610470 is an abundant number, since it is smaller than the sum of its proper divisors (93254730).

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

66610470 is a wasteful number, since it uses less digits than its factorization.

66610470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220359.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 66610470 is about 8161.5237547899. The cubic root of 66610470 is about 405.3661678505.

The spelling of 66610470 in words is "sixty-six million, six hundred ten thousand, four hundred seventy".