66886877 has 4 divisors (see below), whose sum is σ = 67512096. Its totient is φ = 66261660.

The previous prime is 66886849. The next prime is 66886903. The reversal of 66886877 is 77868866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77868866 = 2 ⋅38934433.

It is a cyclic number.

It is not a de Polignac number, because 66886877 - 2¹⁰ = 66885853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66886577) 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, 312449 + ... + 312662.

It is an arithmetic number, because the mean of its divisors is an integer number (16878024).

Almost surely, 2^66886877 is an apocalyptic number.

It is an amenable number.

66886877 is a deficient number, since it is larger than the sum of its proper divisors (625219).

66886877 is a wasteful number, since it uses less digits than its factorization.

66886877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625218.

The product of its digits is 5419008, while the sum is 56.

The square root of 66886877 is about 8178.4397656277. The cubic root of 66886877 is about 405.9260969450.

The spelling of 66886877 in words is "sixty-six million, eight hundred eighty-six thousand, eight hundred seventy-seven".