66770286 has 16 divisors (see below), whose sum is σ = 145680768. Its totient is φ = 20233400.

The previous prime is 66770279. The next prime is 66770287. The reversal of 66770286 is 68207766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505770 + ... + 505901.

It is an arithmetic number, because the mean of its divisors is an integer number (9105048).

Almost surely, 2^66770286 is an apocalyptic number.

66770286 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66770286 is an abundant number, since it is smaller than the sum of its proper divisors (78910482).

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

66770286 is a wasteful number, since it uses less digits than its factorization.

66770286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011687.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 66770286 is about 8171.3087079121. The cubic root of 66770286 is about 405.6901021968.

The spelling of 66770286 in words is "sixty-six million, seven hundred seventy thousand, two hundred eighty-six".