9977655 has 8 divisors (see below), whose sum is σ = 15964272. Its totient is φ = 5321408.

The previous prime is 9977651. The next prime is 9977659. The reversal of 9977655 is 5567799.

It is an interprime number because it is at equal distance from previous prime (9977651) and next prime (9977659).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9977655 - 2² = 9977651 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332574 + ... + 332603.

It is an arithmetic number, because the mean of its divisors is an integer number (1995534).

Almost surely, 2^9977655 is an apocalyptic number.

9977655 is a deficient number, since it is larger than the sum of its proper divisors (5986617).

9977655 is a wasteful number, since it uses less digits than its factorization.

9977655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665185.

The product of its digits is 595350, while the sum is 48.

The square root of 9977655 is about 3158.7426295917. The cubic root of 9977655 is about 215.2828798544.

The spelling of 9977655 in words is "nine million, nine hundred seventy-seven thousand, six hundred fifty-five".