66454797946 has 16 divisors (see below), whose sum is σ = 101887424640. Its totient is φ = 32500185120.

The previous prime is 66454797923. The next prime is 66454797949. The reversal of 66454797946 is 64979745466.

It is not an unprimeable number, because it can be changed into a prime (66454797949) 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, 1948515 + ... + 1982326.

It is an arithmetic number, because the mean of its divisors is an integer number (6367964040).

Almost surely, 2^66454797946 is an apocalyptic number.

66454797946 is a deficient number, since it is larger than the sum of its proper divisors (35432626694).

66454797946 is a wasteful number, since it uses less digits than its factorization.

66454797946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931029.

The product of its digits is 274337280, while the sum is 67.

The spelling of 66454797946 in words is "sixty-six billion, four hundred fifty-four million, seven hundred ninety-seven thousand, nine hundred forty-six".