77700022 has 4 divisors (see below), whose sum is σ = 116550036. Its totient is φ = 38850010.

The previous prime is 77700001. The next prime is 77700023. The reversal of 77700022 is 22000777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22000777 = 53 ⋅415109.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 77700022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77700023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19425004 + ... + 19425007.

It is an arithmetic number, because the mean of its divisors is an integer number (29137509).

Almost surely, 2^77700022 is an apocalyptic number.

77700022 is a deficient number, since it is larger than the sum of its proper divisors (38850014).

77700022 is a wasteful number, since it uses less digits than its factorization.

77700022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38850013.

The product of its (nonzero) digits is 1372, while the sum is 25.

The square root of 77700022 is about 8814.7615963224. The cubic root of 77700022 is about 426.7174279070.

Adding to 77700022 its reverse (22000777), we get a palindrome (99700799).

The spelling of 77700022 in words is "seventy-seven million, seven hundred thousand, twenty-two".