76670421 has 4 divisors (see below), whose sum is σ = 102227232. Its totient is φ = 51113612.

The previous prime is 76670411. The next prime is 76670423. The reversal of 76670421 is 12407667.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12407667 = 3 ⋅4135889.

It is a cyclic number.

It is not a de Polignac number, because 76670421 - 2⁵ = 76670389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76670423) 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, 12778401 + ... + 12778406.

It is an arithmetic number, because the mean of its divisors is an integer number (25556808).

Almost surely, 2^76670421 is an apocalyptic number.

It is an amenable number.

76670421 is a deficient number, since it is larger than the sum of its proper divisors (25556811).

76670421 is a wasteful number, since it uses less digits than its factorization.

76670421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25556810.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 76670421 is about 8756.1647426256. The cubic root of 76670421 is about 424.8242336624.

The spelling of 76670421 in words is "seventy-six million, six hundred seventy thousand, four hundred twenty-one".