1051720520566 has 8 divisors (see below), whose sum is σ = 1577585824920. Its totient is φ = 525858578928.

The previous prime is 1051720520503. The next prime is 1051720520567. The reversal of 1051720520566 is 6650250271501.

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

It is a super-2 number, since 2×1051720520566² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051720520567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197770 + ... + 1463746.

It is an arithmetic number, because the mean of its divisors is an integer number (197198228115).

Almost surely, 2^{1051720520566} is an apocalyptic number.

1051720520566 is a deficient number, since it is larger than the sum of its proper divisors (525865304354).

1051720520566 is a wasteful number, since it uses less digits than its factorization.

1051720520566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681358.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 1051720520566 in words is "one trillion, fifty-one billion, seven hundred twenty million, five hundred twenty thousand, five hundred sixty-six".