164720077 has 4 divisors (see below), whose sum is σ = 164877856. Its totient is φ = 164562300.

The previous prime is 164720027. The next prime is 164720099. The reversal of 164720077 is 770027461.

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 164720077 - 2¹⁵ = 164687309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164720027) 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, 77313 + ... + 79414.

It is an arithmetic number, because the mean of its divisors is an integer number (41219464).

Almost surely, 2^164720077 is an apocalyptic number.

It is an amenable number.

164720077 is a deficient number, since it is larger than the sum of its proper divisors (157779).

164720077 is a wasteful number, since it uses less digits than its factorization.

164720077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157778.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 164720077 is about 12834.3319654745. The cubic root of 164720077 is about 548.1703133138.

The spelling of 164720077 in words is "one hundred sixty-four million, seven hundred twenty thousand, seventy-seven".