663526987977 has 16 divisors (see below), whose sum is σ = 1011100142592. Its totient is φ = 379154004240.

The previous prime is 663526987957. The next prime is 663526988009. The reversal of 663526987977 is 779789625366.

663526987977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663526987977 - 2¹² = 663526983881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663526987899 and 663526987908.

It is not an unprimeable number, because it can be changed into a prime (663526987957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3409618 + ... + 3598964.

It is an arithmetic number, because the mean of its divisors is an integer number (63193758912).

Almost surely, 2^663526987977 is an apocalyptic number.

It is an amenable number.

663526987977 is a deficient number, since it is larger than the sum of its proper divisors (347573154615).

663526987977 is a wasteful number, since it uses less digits than its factorization.

663526987977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356228.

The product of its digits is 1440270720, while the sum is 75.

The spelling of 663526987977 in words is "six hundred sixty-three billion, five hundred twenty-six million, nine hundred eighty-seven thousand, nine hundred seventy-seven".