77663746 has 8 divisors (see below), whose sum is σ = 116765964. Its totient is φ = 38741760.

The previous prime is 77663723. The next prime is 77663749. The reversal of 77663746 is 64736677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75881521 + 1782225 = 8711^2 + 1335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×77663746³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77663696 and 77663705.

It is not an unprimeable number, because it can be changed into a prime (77663749) 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, 43975 + ... + 45706.

Almost surely, 2^77663746 is an apocalyptic number.

77663746 is a deficient number, since it is larger than the sum of its proper divisors (39102218).

77663746 is a wasteful number, since it uses less digits than its factorization.

77663746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90116.

The product of its digits is 889056, while the sum is 46.

The square root of 77663746 is about 8812.7036714053. The cubic root of 77663746 is about 426.6510100320.

The spelling of 77663746 in words is "seventy-seven million, six hundred sixty-three thousand, seven hundred forty-six".