66207453506 has 8 divisors (see below), whose sum is σ = 99390065040. Its totient is φ = 33077431828.

The previous prime is 66207453493. The next prime is 66207453527. The reversal of 66207453506 is 60535470266.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13144316 + ... + 13149351.

It is an arithmetic number, because the mean of its divisors is an integer number (12423758130).

Almost surely, 2^66207453506 is an apocalyptic number.

66207453506 is a deficient number, since it is larger than the sum of its proper divisors (33182611534).

66207453506 is a wasteful number, since it uses less digits than its factorization.

66207453506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26294928.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 66207453506 in words is "sixty-six billion, two hundred seven million, four hundred fifty-three thousand, five hundred six".