20670376566 has 32 divisors (see below), whose sum is σ = 48398934528. Its totient is φ = 5761776960.

The previous prime is 20670376499. The next prime is 20670376567. The reversal of 20670376566 is 66567307602.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670376567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6000130 + ... + 6003573.

It is an arithmetic number, because the mean of its divisors is an integer number (1512466704).

Almost surely, 2^20670376566 is an apocalyptic number.

20670376566 is an abundant number, since it is smaller than the sum of its proper divisors (27728557962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20670376566 is a wasteful number, since it uses less digits than its factorization.

20670376566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12003756.

The product of its (nonzero) digits is 1905120, while the sum is 48.

The spelling of 20670376566 in words is "twenty billion, six hundred seventy million, three hundred seventy-six thousand, five hundred sixty-six".