42666262020 has 72 divisors (see below), whose sum is σ = 130566375576. Its totient is φ = 11276977152.

The previous prime is 42666262019. The next prime is 42666262021. The reversal of 42666262020 is 2026266624.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42666262019) and next prime (42666262021).

It can be written as a sum of positive squares in 4 ways, for example, as 4893562116 + 37772699904 = 69954^2 + 194352^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (42666262021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1028487 + ... + 1069166.

It is an arithmetic number, because the mean of its divisors is an integer number (1813421883).

Almost surely, 2^42666262020 is an apocalyptic number.

It is an amenable number.

42666262020 is an abundant number, since it is smaller than the sum of its proper divisors (87900113556).

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

42666262020 is a wasteful number, since it uses less digits than its factorization.

42666262020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097781 (or 2097776 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 42666262020 in words is "forty-two billion, six hundred sixty-six million, two hundred sixty-two thousand, twenty".