66421562 has 16 divisors (see below), whose sum is σ = 104438592. Its totient is φ = 31621920.

The previous prime is 66421559. The next prime is 66421583. The reversal of 66421562 is 26512466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7262 + ... + 13622.

It is an arithmetic number, because the mean of its divisors is an integer number (6527412).

Almost surely, 2^66421562 is an apocalyptic number.

66421562 is a deficient number, since it is larger than the sum of its proper divisors (38017030).

66421562 is a wasteful number, since it uses less digits than its factorization.

66421562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6613.

The product of its digits is 17280, while the sum is 32.

The square root of 66421562 is about 8149.9424537846. The cubic root of 66421562 is about 404.9825974334.

The spelling of 66421562 in words is "sixty-six million, four hundred twenty-one thousand, five hundred sixty-two".