66461372 has 6 divisors (see below), whose sum is σ = 116307408. Its totient is φ = 33230684.

The previous prime is 66461371. The next prime is 66461383. The reversal of 66461372 is 27316466.

It is a super-3 number, since 3×66461372³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66461371) 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 as a sum of consecutive naturals, namely, 8307668 + ... + 8307675.

It is an arithmetic number, because the mean of its divisors is an integer number (19384568).

Almost surely, 2^66461372 is an apocalyptic number.

It is an amenable number.

66461372 is a deficient number, since it is larger than the sum of its proper divisors (49846036).

66461372 is a wasteful number, since it uses less digits than its factorization.

66461372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16615347 (or 16615345 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 66461372 is about 8152.3844364701. The cubic root of 66461372 is about 405.0634905289.

The spelling of 66461372 in words is "sixty-six million, four hundred sixty-one thousand, three hundred seventy-two".