766700100421 has 2 divisors, whose sum is σ = 766700100422. Its totient is φ = 766700100420.

The previous prime is 766700100391. The next prime is 766700100431. The reversal of 766700100421 is 124001007667.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721796371396 + 44903729025 = 849586^2 + 211905^2 .

It is a cyclic number.

It is not a de Polignac number, because 766700100421 - 2²³ = 766691711813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766700100431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383350050210 + 383350050211.

It is an arithmetic number, because the mean of its divisors is an integer number (383350050211).

Almost surely, 2^766700100421 is an apocalyptic number.

It is an amenable number.

766700100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

766700100421 is an equidigital number, since it uses as much as digits as its factorization.

766700100421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 766700100421 in words is "seven hundred sixty-six billion, seven hundred million, one hundred thousand, four hundred twenty-one".