66700039951 has 8 divisors (see below), whose sum is σ = 69953346144. Its totient is φ = 63476175840.

The previous prime is 66700039949. The next prime is 66700039981. The reversal of 66700039951 is 15993000766.

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 66700039951 - 2¹ = 66700039949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700039981) 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, 7355880 + ... + 7364941.

It is an arithmetic number, because the mean of its divisors is an integer number (8744168268).

Almost surely, 2^66700039951 is an apocalyptic number.

66700039951 is a deficient number, since it is larger than the sum of its proper divisors (3253306193).

66700039951 is a wasteful number, since it uses less digits than its factorization.

66700039951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14721041.

The product of its (nonzero) digits is 306180, while the sum is 46.

The spelling of 66700039951 in words is "sixty-six billion, seven hundred million, thirty-nine thousand, nine hundred fifty-one".