772666 has 4 divisors (see below), whose sum is σ = 1159002. Its totient is φ = 386332.

The previous prime is 772663. The next prime is 772669. The reversal of 772666 is 666277.

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

It is an interprime number because it is at equal distance from previous prime (772663) and next prime (772669).

It can be written as a sum of positive squares in only one way, i.e., 772641 + 25 = 879^2 + 5^2 .

It is not an unprimeable number, because it can be changed into a prime (772661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193165 + ... + 193168.

2⁷⁷²⁶⁶⁶ is an apocalyptic number.

772666 is a deficient number, since it is larger than the sum of its proper divisors (386336).

772666 is a wasteful number, since it uses less digits than its factorization.

772666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386335.

The product of its digits is 21168, while the sum is 34.

The square root of 772666 is about 879.0142205903. The cubic root of 772666 is about 91.7622246851.

The spelling of 772666 in words is "seven hundred seventy-two thousand, six hundred sixty-six".