77070206581 has 16 divisors (see below), whose sum is σ = 80946480384. Its totient is φ = 73238201344.

The previous prime is 77070206579. The next prime is 77070206593. The reversal of 77070206581 is 18560207077.

It is a cyclic number.

It is not a de Polignac number, because 77070206581 - 2¹ = 77070206579 is a prime.

It is a super-2 number, since 2×77070206581² (a number of 23 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 (77070204581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9048981 + ... + 9057493.

It is an arithmetic number, because the mean of its divisors is an integer number (5059155024).

Almost surely, 2^77070206581 is an apocalyptic number.

It is an amenable number.

77070206581 is a deficient number, since it is larger than the sum of its proper divisors (3876273803).

77070206581 is a wasteful number, since it uses less digits than its factorization.

77070206581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11060.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 77070206581 in words is "seventy-seven billion, seventy million, two hundred six thousand, five hundred eighty-one".