2666620446 has 32 divisors (see below), whose sum is σ = 6099079680. Its totient is φ = 761398176.

The previous prime is 2666620433. The next prime is 2666620469. The reversal of 2666620446 is 6440266662.

It is a super-2 number, since 2×2666620446² = 14221729206050477832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 2666620398 and 2666620407.

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, 47740 + ... + 87248.

It is an arithmetic number, because the mean of its divisors is an integer number (190596240).

Almost surely, 2^2666620446 is an apocalyptic number.

2666620446 is an abundant number, since it is smaller than the sum of its proper divisors (3432459234).

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

2666620446 is a wasteful number, since it uses less digits than its factorization.

2666620446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41128.

The product of its (nonzero) digits is 497664, while the sum is 42.

The square root of 2666620446 is about 51639.3304178124. The cubic root of 2666620446 is about 1386.7145367499.

The spelling of 2666620446 in words is "two billion, six hundred sixty-six million, six hundred twenty thousand, four hundred forty-six".