67702076407661 has 4 divisors (see below), whose sum is σ = 67703490420924. Its totient is φ = 67700662394400.

The previous prime is 67702076407627. The next prime is 67702076407663. The reversal of 67702076407661 is 16670467020776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58044681114436 + 9657395293225 = 7618706^2 + 3107635^2 .

It is a cyclic number.

It is not a de Polignac number, because 67702076407661 - 2²² = 67702072213357 is a prime.

It is a super-2 number, since 2×67702076407661² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67702076407661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67702076407663) 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, 706934810 + ... + 707030571.

It is an arithmetic number, because the mean of its divisors is an integer number (16925872605231).

Almost surely, 2^{67702076407661} is an apocalyptic number.

It is an amenable number.

67702076407661 is a deficient number, since it is larger than the sum of its proper divisors (1414013263).

67702076407661 is a wasteful number, since it uses less digits than its factorization.

67702076407661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414013262.

The product of its (nonzero) digits is 24893568, while the sum is 59.

The spelling of 67702076407661 in words is "sixty-seven trillion, seven hundred two billion, seventy-six million, four hundred seven thousand, six hundred sixty-one".