66167772 has 24 divisors (see below), whose sum is σ = 168427392. Its totient is φ = 20050800.

The previous prime is 66167767. The next prime is 66167779. The reversal of 66167772 is 27776166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66167779) 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, 250504 + ... + 250767.

It is an arithmetic number, because the mean of its divisors is an integer number (7017808).

Almost surely, 2^66167772 is an apocalyptic number.

It is an amenable number.

66167772 is an abundant number, since it is smaller than the sum of its proper divisors (102259620).

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

66167772 is a wasteful number, since it uses less digits than its factorization.

66167772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501289 (or 501287 counting only the distinct ones).

The product of its digits is 148176, while the sum is 42.

The square root of 66167772 is about 8134.3575038229. The cubic root of 66167772 is about 404.4661400586.

The spelling of 66167772 in words is "sixty-six million, one hundred sixty-seven thousand, seven hundred seventy-two".