2506363666 has 4 divisors (see below), whose sum is σ = 3759545502. Its totient is φ = 1253181832.

The previous prime is 2506363637. The next prime is 2506363667. The reversal of 2506363666 is 6663636052.

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

It can be written as a sum of positive squares in only one way, i.e., 2327580025 + 178783641 = 48245^2 + 13371^2 .

It is not an unprimeable number, because it can be changed into a prime (2506363667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626590915 + ... + 626590918.

Almost surely, 2^2506363666 is an apocalyptic number.

2506363666 is a deficient number, since it is larger than the sum of its proper divisors (1253181836).

2506363666 is a wasteful number, since it uses less digits than its factorization.

2506363666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253181835.

The product of its (nonzero) digits is 699840, while the sum is 43.

The square root of 2506363666 is about 50063.5962152141. The cubic root of 2506363666 is about 1358.3594090502.

The spelling of 2506363666 in words is "two billion, five hundred six million, three hundred sixty-three thousand, six hundred sixty-six".