66723963 has 8 divisors (see below), whose sum is σ = 94198608. Its totient is φ = 41865984.

The previous prime is 66723961. The next prime is 66724033. The reversal of 66723963 is 36932766.

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

It is not a de Polignac number, because 66723963 - 2¹ = 66723961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66723961) 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, 654106 + ... + 654207.

It is an arithmetic number, because the mean of its divisors is an integer number (11774826).

Almost surely, 2^66723963 is an apocalyptic number.

66723963 is a deficient number, since it is larger than the sum of its proper divisors (27474645).

66723963 is a wasteful number, since it uses less digits than its factorization.

66723963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308333.

The product of its digits is 244944, while the sum is 42.

The square root of 66723963 is about 8168.4737252439. The cubic root of 66723963 is about 405.5962624000.

The spelling of 66723963 in words is "sixty-six million, seven hundred twenty-three thousand, nine hundred sixty-three".