66651206007 has 8 divisors (see below), whose sum is σ = 89182297984. Its totient is φ = 44277125688.

The previous prime is 66651205997. The next prime is 66651206059. The reversal of 66651206007 is 70060215666.

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

It is not a de Polignac number, because 66651206007 - 2⁴ = 66651205991 is a prime.

It is a super-3 number, since 3×66651206007³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66651206407) 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, 39251923 + ... + 39253620.

It is an arithmetic number, because the mean of its divisors is an integer number (11147787248).

Almost surely, 2^66651206007 is an apocalyptic number.

66651206007 is a deficient number, since it is larger than the sum of its proper divisors (22531091977).

66651206007 is a wasteful number, since it uses less digits than its factorization.

66651206007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78505829.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 66651206007 in words is "sixty-six billion, six hundred fifty-one million, two hundred six thousand, seven".