766665422 has 8 divisors (see below), whose sum is σ = 1217645136. Its totient is φ = 360783712.

The previous prime is 766665407. The next prime is 766665461. The reversal of 766665422 is 224566667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11274458 + ... + 11274525.

It is an arithmetic number, because the mean of its divisors is an integer number (152205642).

Almost surely, 2^766665422 is an apocalyptic number.

766665422 is a deficient number, since it is larger than the sum of its proper divisors (450979714).

766665422 is a wasteful number, since it uses less digits than its factorization.

766665422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22549002.

The product of its digits is 725760, while the sum is 44.

The square root of 766665422 is about 27688.7237336790. The cubic root of 766665422 is about 915.2406314674.

The spelling of 766665422 in words is "seven hundred sixty-six million, six hundred sixty-five thousand, four hundred twenty-two".