66263946 has 32 divisors (see below), whose sum is σ = 154987008. Its totient is φ = 18491760.

The previous prime is 66263893. The next prime is 66263947. The reversal of 66263946 is 64936266.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 66263898 and 66263907.

It is not an unprimeable number, because it can be changed into a prime (66263947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16540 + ... + 20151.

It is an arithmetic number, because the mean of its divisors is an integer number (4843344).

Almost surely, 2^66263946 is an apocalyptic number.

66263946 is an abundant number, since it is smaller than the sum of its proper divisors (88723062).

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

66263946 is a wasteful number, since it uses less digits than its factorization.

66263946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36746.

The product of its digits is 279936, while the sum is 42.

The square root of 66263946 is about 8140.2669489397. The cubic root of 66263946 is about 404.6620072919.

The spelling of 66263946 in words is "sixty-six million, two hundred sixty-three thousand, nine hundred forty-six".