65977552 has 20 divisors (see below), whose sum is σ = 132240420. Its totient is φ = 31851008.

The previous prime is 65977537. The next prime is 65977553. The reversal of 65977552 is 25577956.

It can be written as a sum of positive squares in 2 ways, for example, as 55890576 + 10086976 = 7476^2 + 3176^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65977553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70633 + ... + 71560.

It is an arithmetic number, because the mean of its divisors is an integer number (6612021).

Almost surely, 2^65977552 is an apocalyptic number.

It is an amenable number.

65977552 is an abundant number, since it is smaller than the sum of its proper divisors (66262868).

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

65977552 is a wasteful number, since it uses less digits than its factorization.

65977552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142230 (or 142224 counting only the distinct ones).

The product of its digits is 661500, while the sum is 46.

The square root of 65977552 is about 8122.6567082452. The cubic root of 65977552 is about 404.0781798183.

The spelling of 65977552 in words is "sixty-five million, nine hundred seventy-seven thousand, five hundred fifty-two".