662121061 has 4 divisors (see below), whose sum is σ = 756709792. Its totient is φ = 567532332.

The previous prime is 662121017. The next prime is 662121071. The reversal of 662121061 is 160121266.

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 a de Polignac number, because none of the positive numbers 2^k-662121061 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 (662121071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47294355 + ... + 47294368.

It is an arithmetic number, because the mean of its divisors is an integer number (189177448).

Almost surely, 2^662121061 is an apocalyptic number.

It is an amenable number.

662121061 is a deficient number, since it is larger than the sum of its proper divisors (94588731).

662121061 is an equidigital number, since it uses as much as digits as its factorization.

662121061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94588730.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 662121061 is about 25731.7131376828. The cubic root of 662121061 is about 871.5904588132.

The spelling of 662121061 in words is "six hundred sixty-two million, one hundred twenty-one thousand, sixty-one".