770140067021 has 4 divisors (see below), whose sum is σ = 829381610652. Its totient is φ = 710898523392.

The previous prime is 770140066973. The next prime is 770140067057. The reversal of 770140067021 is 120760041077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120760041077 = 13 ⋅9289233929.

It can be written as a sum of positive squares in 2 ways, for example, as 66093211396 + 704046855625 = 257086^2 + 839075^2 .

It is a cyclic number.

It is not a de Polignac number, because 770140067021 - 2²⁶ = 770072958157 is a prime.

It is a super-2 number, since 2×770140067021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770140067071) 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, 29620771796 + ... + 29620771821.

It is an arithmetic number, because the mean of its divisors is an integer number (207345402663).

Almost surely, 2^770140067021 is an apocalyptic number.

It is an amenable number.

770140067021 is a deficient number, since it is larger than the sum of its proper divisors (59241543631).

770140067021 is a wasteful number, since it uses less digits than its factorization.

770140067021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59241543630.

The product of its (nonzero) digits is 16464, while the sum is 35.

The spelling of 770140067021 in words is "seven hundred seventy billion, one hundred forty million, sixty-seven thousand, twenty-one".