70722566 has 4 divisors (see below), whose sum is σ = 106083852. Its totient is φ = 35361282.

The previous prime is 70722529. The next prime is 70722583. The reversal of 70722566 is 66522707.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66522707 = 37 ⋅1797911.

It is a Curzon number.

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, 17680640 + ... + 17680643.

It is an arithmetic number, because the mean of its divisors is an integer number (26520963).

Almost surely, 2^70722566 is an apocalyptic number.

70722566 is a deficient number, since it is larger than the sum of its proper divisors (35361286).

70722566 is a wasteful number, since it uses less digits than its factorization.

70722566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35361285.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 70722566 is about 8409.6709804843. The cubic root of 70722566 is about 413.5417264854.

The spelling of 70722566 in words is "seventy million, seven hundred twenty-two thousand, five hundred sixty-six".