66412651 has 8 divisors (see below), whose sum is σ = 67437504. Its totient is φ = 65395200.

The previous prime is 66412637. The next prime is 66412663. The reversal of 66412651 is 15621466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66412651 - 2⁹ = 66412139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66412631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17790 + ... + 21196.

It is an arithmetic number, because the mean of its divisors is an integer number (8429688).

Almost surely, 2^66412651 is an apocalyptic number.

66412651 is a deficient number, since it is larger than the sum of its proper divisors (1024853).

66412651 is a wasteful number, since it uses less digits than its factorization.

66412651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701.

The product of its digits is 8640, while the sum is 31.

The square root of 66412651 is about 8149.3957444709. The cubic root of 66412651 is about 404.9644860390.

The spelling of 66412651 in words is "sixty-six million, four hundred twelve thousand, six hundred fifty-one".