77670445 has 8 divisors (see below), whose sum is σ = 93300480. Its totient is φ = 62072400.

The previous prime is 77670443. The next prime is 77670479. The reversal of 77670445 is 54407677.

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

It is not a de Polignac number, because 77670445 - 2¹ = 77670443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77670398 and 77670407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77670443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2281 + ... + 12670.

It is an arithmetic number, because the mean of its divisors is an integer number (11662560).

Almost surely, 2^77670445 is an apocalyptic number.

It is an amenable number.

77670445 is a deficient number, since it is larger than the sum of its proper divisors (15630035).

77670445 is a wasteful number, since it uses less digits than its factorization.

77670445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15995.

The product of its (nonzero) digits is 164640, while the sum is 40.

The square root of 77670445 is about 8813.0837395318. The cubic root of 77670445 is about 426.6632768150.

The spelling of 77670445 in words is "seventy-seven million, six hundred seventy thousand, four hundred forty-five".