63977772 has 18 divisors (see below), whose sum is σ = 149346148. Its totient is φ = 21316688.

The previous prime is 63977713. The next prime is 63977779. The reversal of 63977772 is 27777936.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63977779) 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, 26554 + ... + 28862.

Almost surely, 2^63977772 is an apocalyptic number.

It is an amenable number.

63977772 is an abundant number, since it is smaller than the sum of its proper divisors (85368376).

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

63977772 is an equidigital number, since it uses as much as digits as its factorization.

63977772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4625 (or 2314 counting only the distinct ones).

The product of its digits is 777924, while the sum is 48.

The square root of 63977772 is about 7998.6106293531. The cubic root of 63977772 is about 399.9536863045.

Multiplying 63977772 by its sum of digits (48), we get a square (3070933056 = 55416²).

The spelling of 63977772 in words is "sixty-three million, nine hundred seventy-seven thousand, seven hundred seventy-two".