212877661 has 8 divisors (see below), whose sum is σ = 220413600. Its totient is φ = 205354800.

The previous prime is 212877629. The next prime is 212877671. The reversal of 212877661 is 166778212.

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

It is not a de Polignac number, because 212877661 - 2⁵ = 212877629 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 (212877601) 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, 39550 + ... + 44608.

It is an arithmetic number, because the mean of its divisors is an integer number (27551700).

Almost surely, 2^212877661 is an apocalyptic number.

It is an amenable number.

212877661 is a deficient number, since it is larger than the sum of its proper divisors (7535939).

212877661 is a wasteful number, since it uses less digits than its factorization.

212877661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539.

The product of its digits is 56448, while the sum is 40.

The square root of 212877661 is about 14590.3276522496. The cubic root of 212877661 is about 597.0949020822.

The spelling of 212877661 in words is "two hundred twelve million, eight hundred seventy-seven thousand, six hundred sixty-one".