8405642662 has 4 divisors (see below), whose sum is σ = 12608463996. Its totient is φ = 4202821330.

The previous prime is 8405642657. The next prime is 8405642669. The reversal of 8405642662 is 2662465048.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×8405642662² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8405642669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2101410664 + ... + 2101410667.

It is an arithmetic number, because the mean of its divisors is an integer number (3152115999).

Almost surely, 2^8405642662 is an apocalyptic number.

8405642662 is a deficient number, since it is larger than the sum of its proper divisors (4202821334).

8405642662 is a wasteful number, since it uses less digits than its factorization.

8405642662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202821333.

The product of its (nonzero) digits is 552960, while the sum is 43.

The square root of 8405642662 is about 91682.2919761499. The cubic root of 8405642662 is about 2033.2477848507.

The spelling of 8405642662 in words is "eight billion, four hundred five million, six hundred forty-two thousand, six hundred sixty-two".