662772921 has 4 divisors (see below), whose sum is σ = 883697232. Its totient is φ = 441848612.

The previous prime is 662772917. The next prime is 662772923. The reversal of 662772921 is 129277266.

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.

It is a cyclic number.

It is not a de Polignac number, because 662772921 - 2² = 662772917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (662772923) 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, 110462151 + ... + 110462156.

It is an arithmetic number, because the mean of its divisors is an integer number (220924308).

Almost surely, 2^662772921 is an apocalyptic number.

It is an amenable number.

662772921 is a deficient number, since it is larger than the sum of its proper divisors (220924311).

662772921 is a wasteful number, since it uses less digits than its factorization.

662772921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220924310.

The product of its digits is 127008, while the sum is 42.

The square root of 662772921 is about 25744.3764927411. The cubic root of 662772921 is about 871.8763927317.

The spelling of 662772921 in words is "six hundred sixty-two million, seven hundred seventy-two thousand, nine hundred twenty-one".