66461012 has 12 divisors (see below), whose sum is σ = 122428320. Its totient is φ = 31481496.

The previous prime is 66461009. The next prime is 66461051. The reversal of 66461012 is 21016466.

It is a happy number.

It is a super-2 number, since 2×66461012² = 8834132232128288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437168 + ... + 437319.

It is an arithmetic number, because the mean of its divisors is an integer number (10202360).

Almost surely, 2^66461012 is an apocalyptic number.

It is an amenable number.

66461012 is a deficient number, since it is larger than the sum of its proper divisors (55967308).

66461012 is a wasteful number, since it uses less digits than its factorization.

66461012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874510 (or 874508 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 66461012 is about 8152.3623570104. The cubic root of 66461012 is about 405.0627591611.

Adding to 66461012 its reverse (21016466), we get a palindrome (87477478).

The spelling of 66461012 in words is "sixty-six million, four hundred sixty-one thousand, twelve".