78420074662 has 4 divisors (see below), whose sum is σ = 117630111996. Its totient is φ = 39210037330.

The previous prime is 78420074659. The next prime is 78420074713. The reversal of 78420074662 is 26647002487.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×78420074662² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19605018664 + ... + 19605018667.

It is an arithmetic number, because the mean of its divisors is an integer number (29407527999).

Almost surely, 2^78420074662 is an apocalyptic number.

78420074662 is a deficient number, since it is larger than the sum of its proper divisors (39210037334).

78420074662 is a wasteful number, since it uses less digits than its factorization.

78420074662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39210037333.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 78420074662 in words is "seventy-eight billion, four hundred twenty million, seventy-four thousand, six hundred sixty-two".