766148250078721 has 4 divisors (see below), whose sum is σ = 768855487711792. Its totient is φ = 763441012445652.

The previous prime is 766148250078649. The next prime is 766148250078749. The reversal of 766148250078721 is 127870052841667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 766148250078721 - 2¹⁹ = 766148249554433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766148250078521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353618816111 + ... + 1353618816676.

It is an arithmetic number, because the mean of its divisors is an integer number (192213871927948).

Almost surely, 2^{766148250078721} is an apocalyptic number.

It is an amenable number.

766148250078721 is a deficient number, since it is larger than the sum of its proper divisors (2707237633071).

766148250078721 is a wasteful number, since it uses less digits than its factorization.

766148250078721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707237633070.

The product of its (nonzero) digits is 63221760, while the sum is 64.

The spelling of 766148250078721 in words is "seven hundred sixty-six trillion, one hundred forty-eight billion, two hundred fifty million, seventy-eight thousand, seven hundred twenty-one".