787222666 has 4 divisors (see below), whose sum is σ = 1180834002. Its totient is φ = 393611332.

The previous prime is 787222627. The next prime is 787222669. The reversal of 787222666 is 666222787.

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., 587820025 + 199402641 = 24245^2 + 14121^2 .

It is not an unprimeable number, because it can be changed into a prime (787222669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196805665 + ... + 196805668.

Almost surely, 2^787222666 is an apocalyptic number.

787222666 is a deficient number, since it is larger than the sum of its proper divisors (393611336).

787222666 is a wasteful number, since it uses less digits than its factorization.

787222666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393611335.

The product of its digits is 677376, while the sum is 46.

The square root of 787222666 is about 28057.4885903924. The cubic root of 787222666 is about 923.3489577857.

The spelling of 787222666 in words is "seven hundred eighty-seven million, two hundred twenty-two thousand, six hundred sixty-six".