2662391906 has 16 divisors (see below), whose sum is σ = 4157716344. Its totient is φ = 1277472384.

The previous prime is 2662391903. The next prime is 2662391911. The reversal of 2662391906 is 6091932662.

It can be written as a sum of positive squares in 4 ways, for example, as 2497500625 + 164891281 = 49975^2 + 12841^2 .

It is a super-2 number, since 2×2662391906² = 14176661322268625672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2662391903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241025 + ... + 251828.

Almost surely, 2^2662391906 is an apocalyptic number.

2662391906 is a deficient number, since it is larger than the sum of its proper divisors (1495324438).

2662391906 is a wasteful number, since it uses less digits than its factorization.

2662391906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492965.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 2662391906 is about 51598.3711564619. The cubic root of 2662391906 is about 1385.9811640289.

The spelling of 2662391906 in words is "two billion, six hundred sixty-two million, three hundred ninety-one thousand, nine hundred six".