2666502406 has 4 divisors (see below), whose sum is σ = 3999753612. Its totient is φ = 1333251202.

The previous prime is 2666502383. The next prime is 2666502431. The reversal of 2666502406 is 6042056662.

It is a happy number.

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

It is a super-2 number, since 2×2666502406² = 14220470162407577672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666625600 + ... + 666625603.

It is an arithmetic number, because the mean of its divisors is an integer number (999938403).

Almost surely, 2^2666502406 is an apocalyptic number.

2666502406 is a deficient number, since it is larger than the sum of its proper divisors (1333251206).

2666502406 is a wasteful number, since it uses less digits than its factorization.

2666502406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333251205.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 2666502406 is about 51638.1874778734. The cubic root of 2666502406 is about 1386.6940751203.

The spelling of 2666502406 in words is "two billion, six hundred sixty-six million, five hundred two thousand, four hundred six".