66772607 has 4 divisors (see below), whose sum is σ = 72842856. Its totient is φ = 60702360.

The previous prime is 66772591. The next prime is 66772609. The reversal of 66772607 is 70627766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66772607 - 2⁴ = 66772591 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 (66772609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035108 + ... + 3035129.

It is an arithmetic number, because the mean of its divisors is an integer number (18210714).

Almost surely, 2^66772607 is an apocalyptic number.

66772607 is a deficient number, since it is larger than the sum of its proper divisors (6070249).

66772607 is a wasteful number, since it uses less digits than its factorization.

66772607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6070248.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 66772607 is about 8171.4507279919. The cubic root of 66772607 is about 405.6948028697.

The spelling of 66772607 in words is "sixty-six million, seven hundred seventy-two thousand, six hundred seven".