2666166502 has 4 divisors (see below), whose sum is σ = 3999249756. Its totient is φ = 1333083250.

The previous prime is 2666166449. The next prime is 2666166551. The reversal of 2666166502 is 2056616662.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666541624 + ... + 666541627.

It is an arithmetic number, because the mean of its divisors is an integer number (999812439).

Almost surely, 2^2666166502 is an apocalyptic number.

2666166502 is a deficient number, since it is larger than the sum of its proper divisors (1333083254).

2666166502 is a wasteful number, since it uses less digits than its factorization.

2666166502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333083253.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 2666166502 is about 51634.9348987679. The cubic root of 2666166502 is about 1386.6358445776.

The spelling of 2666166502 in words is "two billion, six hundred sixty-six million, one hundred sixty-six thousand, five hundred two".