20966666462 has 32 divisors (see below), whose sum is σ = 37645171200. Its totient is φ = 8563043808.

The previous prime is 20966666447. The next prime is 20966666477. The reversal of 20966666462 is 26466666902.

It is an interprime number because it is at equal distance from previous prime (20966666447) and next prime (20966666477).

It is a super-2 number, since 2×20966666462² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34412 + ... + 207647.

It is an arithmetic number, because the mean of its divisors is an integer number (1176411600).

Almost surely, 2^20966666462 is an apocalyptic number.

20966666462 is a deficient number, since it is larger than the sum of its proper divisors (16678504738).

20966666462 is a wasteful number, since it uses less digits than its factorization.

20966666462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242360.

The product of its (nonzero) digits is 6718464, while the sum is 53.

The spelling of 20966666462 in words is "twenty billion, nine hundred sixty-six million, six hundred sixty-six thousand, four hundred sixty-two".