766643942 has 32 divisors (see below), whose sum is σ = 1221454080. Its totient is φ = 360334240.

The previous prime is 766643909. The next prime is 766643957. The reversal of 766643942 is 249346667.

It is a congruent 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, 340673 + ... + 342915.

It is an arithmetic number, because the mean of its divisors is an integer number (38170440).

Almost surely, 2^766643942 is an apocalyptic number.

766643942 is a deficient number, since it is larger than the sum of its proper divisors (454810138).

766643942 is a wasteful number, since it uses less digits than its factorization.

766643942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428.

The product of its digits is 1306368, while the sum is 47.

The square root of 766643942 is about 27688.3358474286. The cubic root of 766643942 is about 915.2320838221.

The spelling of 766643942 in words is "seven hundred sixty-six million, six hundred forty-three thousand, nine hundred forty-two".