77066225 has 6 divisors (see below), whose sum is σ = 95562150. Its totient is φ = 61652960.

The previous prime is 77066221. The next prime is 77066263. The reversal of 77066225 is 52266077.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1515361 + 75550864 = 1231^2 + 8692^2 .

It is not a de Polignac number, because 77066225 - 2² = 77066221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77066221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1541300 + ... + 1541349.

It is an arithmetic number, because the mean of its divisors is an integer number (15927025).

Almost surely, 2^77066225 is an apocalyptic number.

It is an amenable number.

77066225 is a deficient number, since it is larger than the sum of its proper divisors (18495925).

77066225 is a wasteful number, since it uses less digits than its factorization.

77066225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082659 (or 3082654 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 77066225 is about 8778.7370959609. The cubic root of 77066225 is about 425.5540179685.

It can be divided in two parts, 7706 and 6225, that added together give a palindrome (13931).

The spelling of 77066225 in words is "seventy-seven million, sixty-six thousand, two hundred twenty-five".