672779610 has 48 divisors (see below), whose sum is σ = 1765300680. Its totient is φ = 177759360.

The previous prime is 672779609. The next prime is 672779617. The reversal of 672779610 is 16977276.

672779610 is a `hidden beast` number, since 6 + 7 + 27 + 7 + 9 + 610 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 514246329 + 158533281 = 22677^2 + 12591^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (672779617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24481 + ... + 44100.

Almost surely, 2^672779610 is an apocalyptic number.

672779610 is an abundant number, since it is smaller than the sum of its proper divisors (1092521070).

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

672779610 is a wasteful number, since it uses less digits than its factorization.

672779610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68703 (or 68700 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 672779610 is about 25937.9954892432. The cubic root of 672779610 is about 876.2424189907.

The spelling of 672779610 in words is "six hundred seventy-two million, seven hundred seventy-nine thousand, six hundred ten".