66223773 has 24 divisors (see below), whose sum is σ = 119261376. Its totient is φ = 34401600.

The previous prime is 66223771. The next prime is 66223811. The reversal of 66223773 is 37732266.

It is not a de Polignac number, because 66223773 - 2¹ = 66223771 is a prime.

It is a super-2 number, since 2×66223773² = 8771176220711058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66223771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47088 + ... + 48473.

It is an arithmetic number, because the mean of its divisors is an integer number (4969224).

Almost surely, 2^66223773 is an apocalyptic number.

66223773 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

66223773 is a deficient number, since it is larger than the sum of its proper divisors (53037603).

66223773 is a wasteful number, since it uses less digits than its factorization.

66223773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95585 (or 95582 counting only the distinct ones).

The product of its digits is 63504, while the sum is 36.

The square root of 66223773 is about 8137.7990267639. The cubic root of 66223773 is about 404.5802143305.

The spelling of 66223773 in words is "sixty-six million, two hundred twenty-three thousand, seven hundred seventy-three".