766971956 has 6 divisors (see below), whose sum is σ = 1342200930. Its totient is φ = 383485976.

The previous prime is 766971943. The next prime is 766971967. The reversal of 766971956 is 659179667.

It can be written as a sum of positive squares in only one way, i.e., 722749456 + 44222500 = 26884^2 + 6650^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95871491 + ... + 95871498.

It is an arithmetic number, because the mean of its divisors is an integer number (223700155).

Almost surely, 2^766971956 is an apocalyptic number.

It is an amenable number.

766971956 is a deficient number, since it is larger than the sum of its proper divisors (575228974).

766971956 is a wasteful number, since it uses less digits than its factorization.

766971956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191742993 (or 191742991 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 56.

The square root of 766971956 is about 27694.2585385491. The cubic root of 766971956 is about 915.3625947042.

The spelling of 766971956 in words is "seven hundred sixty-six million, nine hundred seventy-one thousand, nine hundred fifty-six".