625463666 has 4 divisors (see below), whose sum is σ = 938195502. Its totient is φ = 312731832.

The previous prime is 625463647. The next prime is 625463669. The reversal of 625463666 is 666364526.

625463666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 565726225 + 59737441 = 23785^2 + 7729^2 .

It is not an unprimeable number, because it can be changed into a prime (625463669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156365915 + ... + 156365918.

Almost surely, 2^625463666 is an apocalyptic number.

625463666 is a deficient number, since it is larger than the sum of its proper divisors (312731836).

625463666 is a wasteful number, since it uses less digits than its factorization.

625463666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312731835.

The product of its digits is 933120, while the sum is 44.

The square root of 625463666 is about 25009.2716007484. The cubic root of 625463666 is about 855.1993497979.

The spelling of 625463666 in words is "six hundred twenty-five million, four hundred sixty-three thousand, six hundred sixty-six".