766347506 has 4 divisors (see below), whose sum is σ = 1149521262. Its totient is φ = 383173752.

The previous prime is 766347487. The next prime is 766347611. The reversal of 766347506 is 605743667.

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., 745563025 + 20784481 = 27305^2 + 4559^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191586875 + ... + 191586878.

Almost surely, 2^766347506 is an apocalyptic number.

766347506 is a deficient number, since it is larger than the sum of its proper divisors (383173756).

766347506 is a wasteful number, since it uses less digits than its factorization.

766347506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383173755.

The product of its (nonzero) digits is 635040, while the sum is 44.

The square root of 766347506 is about 27682.9822454157. The cubic root of 766347506 is about 915.1141052320.

The spelling of 766347506 in words is "seven hundred sixty-six million, three hundred forty-seven thousand, five hundred six".