77396761 has 12 divisors (see below), whose sum is σ = 84371052. Its totient is φ = 70963776.

The previous prime is 77396743. The next prime is 77396773. The reversal of 77396761 is 16769377.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1166400 + 76230361 = 1080^2 + 8731^2 .

It is not a de Polignac number, because 77396761 - 2¹³ = 77388569 is a prime.

It is a super-2 number, since 2×77396761² = 11980517226582242, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (333396) is a multiple of the sum of its prime divisors (3087).

It is not an unprimeable number, because it can be changed into a prime (77396701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25075 + ... + 27991.

It is an arithmetic number, because the mean of its divisors is an integer number (7030921).

Almost surely, 2^77396761 is an apocalyptic number.

It is an amenable number.

77396761 is a deficient number, since it is larger than the sum of its proper divisors (6974291).

77396761 is a wasteful number, since it uses less digits than its factorization.

77396761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100 (or 3087 counting only the distinct ones).

The product of its digits is 333396, while the sum is 46.

The square root of 77396761 is about 8797.5428956044. The cubic root of 77396761 is about 426.1615487127.

The spelling of 77396761 in words is "seventy-seven million, three hundred ninety-six thousand, seven hundred sixty-one".