77670061 has 4 divisors (see below), whose sum is σ = 88765792. Its totient is φ = 66574332.

The previous prime is 77670053. The next prime is 77670101. The reversal of 77670061 is 16007677.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77670061 - 2³ = 77670053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77669999 and 77670026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77670001) 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, 5547855 + ... + 5547868.

It is an arithmetic number, because the mean of its divisors is an integer number (22191448).

Almost surely, 2^77670061 is an apocalyptic number.

It is an amenable number.

77670061 is a deficient number, since it is larger than the sum of its proper divisors (11095731).

77670061 is a wasteful number, since it uses less digits than its factorization.

77670061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11095730.

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 77670061 is about 8813.0619537139. The cubic root of 77670061 is about 426.6625736776.

The spelling of 77670061 in words is "seventy-seven million, six hundred seventy thousand, sixty-one".