625676778 has 32 divisors (see below), whose sum is σ = 1393761600. Its totient is φ = 208053648.

The previous prime is 625676759. The next prime is 625676839. The reversal of 625676778 is 877676526.

625676778 is a `hidden beast` number, since 6 + 2 + 567 + 6 + 7 + 78 = 666.

It is a super-2 number, since 2×625676778² = 782942861056922568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8800 + ... + 36452.

It is an arithmetic number, because the mean of its divisors is an integer number (43555050).

Almost surely, 2^625676778 is an apocalyptic number.

625676778 is an abundant number, since it is smaller than the sum of its proper divisors (768084822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625676778 is a wasteful number, since it uses less digits than its factorization.

625676778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28083 (or 28077 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The square root of 625676778 is about 25013.5318977549. The cubic root of 625676778 is about 855.2964684414.

The spelling of 625676778 in words is "six hundred twenty-five million, six hundred seventy-six thousand, seven hundred seventy-eight".